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4MXM68M
User Manual
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Daikin 4MXM68M, 2MXM40M User Manual

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Service
Manual
RA R32 Split &
ESIE16-02B
multi split M-Series
Indoor unit Outdoor unit
FTXJ-M FTXM-M FTXP-KV FDXM-F RXJ-M RXM-M MXM-M MXM-N
RA R32 Split & multi split M-Series
The present publication is drawn up by way of information only and does not constitute an offer binding upon Daikin Europe N.V.. Daikin Europe N.V. has compiled the content of this publication to the best of its knowledge. No express or implied warranty is given for the completeness, accuracy, reliability or fitness for particular purpose of its content and the products and services presented therein. Specifications are subject to change without prior notice. Daikin Europe N.V. explicitly rejects any liability for any direct or indirect damage, in the broadest sense, arising from or related to the use and/or interpretation of this publication. All content is copyrighted by Daikin Europe N.V..
Page 2 4/04/17 | Version 1.1
RA R32 Split & multi split M-Series
ESIE16-02B |
Part 1. Introduction ....................................................................................................................9
1.1. Version log .................................................................................................................................................9
1.2. Safety precautions ...................................................................................................................................10
1.2.1. Meaning of symbols .....................................................................................................................................10
1.2.2. Warnings ...................................................................................................................................................... 10
1.2.3. Cautions ....................................................................................................................................................... 12
1.2.4. Information ...................................................................................................................................................12
1.3. General operation ....................................................................................................................................13
1.4. How to use ...............................................................................................................................................14
1.4.1. Interactive information flow ........................................................................................................................... 14
1.4.2. Parts of the book ..........................................................................................................................................15
1.4.2.1. The introduction chapter .......................................................................................................................... 15
1.4.2.2. The troubleshooting chapter .................................................................................................................... 15
1.4.2.3. The repair chapter .................................................................................................................................... 15
1.4.2.4. The maintenance chapter ........................................................................................................................ 15
1.4.2.5. Appendices .............................................................................................................................................. 15
1.4.3. Contact information ......................................................................................................................................15
Part 2. Troubleshooting ...........................................................................................................17
2.1. Error codes check ....................................................................................................................................17
2.1.1. Error codes via remote controller ................................................................................................................. 17
2.1.1.1. General .................................................................................................................................................... 17
2.1.1.2. How to reset error codes .......................................................................................................................... 17
2.1.1.3. History of error codes ............................................................................................................................... 17
2.1.2. Error codes via outdoor unit PCB .................................................................................................................18
2.1.2.1. How to retrieve error codes ...................................................................................................................... 18
2.1.2.2. How to reset error codes .......................................................................................................................... 18
2.1.2.3. History of error codes ............................................................................................................................... 19
2.1.2.4. Content of retry ........................................................................................................................................ 19
2.2. Error based troubleshooting .....................................................................................................................20
2.2.1. Indoor unit .................................................................................................................................................... 21
2.2.1.1. “A1-00” – PCB abnormality ...................................................................................................................... 21
2.2.1.2. “A1-01” – PCB abnormality ...................................................................................................................... 21
2.2.1.3. “A5-00” – Freeze-up protection / Heating peak cut control ...................................................................... 22
2.2.1.4. “A6-00” – Fan motor abnormality ............................................................................................................. 22
2.2.1.5. “C4-00” – Liquid pipe thermistor for heat exchanger abnormality ............................................................ 23
2.2.1.6. “C7-00” – Front panel open/close fault .................................................................................................... 23
2.2.1.7. “C9-00” – Suction air thermistor abnormality ........................................................................................... 23
2.2.1.8. “UH-00” – Anti-icing function in other room(s) ......................................................................................... 24
2.2.2. Outdoor unit .................................................................................................................................................. 25
2.2.2.1. “E1-00” – Outdoor unit PCB abnormality ................................................................................................. 25
2.2.2.2. “E3-00” – Discharge pressure abnormality .............................................................................................. 25
2.2.2.3. “E5-00” – Compressor motor lock or overheated ..................................................................................... 26
2.2.2.4. “E6-00” – Compressor motor lock ............................................................................................................ 26
2.2.2.5. “E7-00” – Fan motor abnormality ............................................................................................................. 27
2.2.2.6. “E8-00” – Compressor overcurrent detection ........................................................................................... 28
2.2.2.7. “EA-00” – 4-way valve abnormality .......................................................................................................... 28
2.2.2.8. “F3-00” – Discharge pipe temperature abnormality ................................................................................. 29
2.2.2.9. “F6-00” – High pressure abnormality or refrigerant overcharge ...............................................................29
2.2.2.10. “H0-00” – Compressor sensor system abnormality ............................................................................... 30
2.2.2.11. “H6-00” – Position detection sensor abnormality ................................................................................... 30
2.2.2.12. “H8-00” – Compressor input (CT) system abnormality .......................................................................... 31
2.2.2.13. “H9-00” – Outdoor air temperature thermistor abnormality ....................................................................31
2.2.2.14. “J3-00” – Discharge pipe thermistor abnormality ................................................................................... 32
2.2.2.15. “J5-00” – Suction pipe thermistor abnormality .......................................................................................32
2.2.2.16. “J6-00” – Outdoor heat exchanger thermistor abnormality .................................................................... 32
2.2.2.17. “J8-00” – Liquid pipe thermistor abnormality .......................................................................................... 33
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RA R32 Split & multi split M-Series
2.2.2.18. “J9-00” – Gas pipe thermistor abnormality ............................................................................................. 33
2.2.2.19. “L1-00” – Outdoor main PCB abnormality ..............................................................................................34
2.2.2.20. “L3-00” – Switch box temperature abnormality ......................................................................................34
2.2.2.21. “L4-00” – Inverter radiating fin temperature abnormality ........................................................................35
2.2.2.22. “L5-00” – Inverter instantaneous overcurrent (AC output) .....................................................................36
2.2.2.23. “P4-00” – Radiating fin temperature sensor abnormality ....................................................................... 36
2.2.3. System ......................................................................................................................................................... 38
2.2.3.1. “U0-00” – Refrigerant shortage ................................................................................................................ 38
2.2.3.2. “U2-00” – Power supply abnormality or instantaneous power failure .......................................................38
2.2.3.3. “U4-00” – Transmission abnormality between indoor unit and outdoor unit .............................................39
2.2.3.4. “U7-00” – Transmission outdoor unit-outdoor unit abnormality ................................................................40
2.2.3.5. “UA-00” – Improper combination of indoor unit and outdoor unit .............................................................40
2.2.3.6. “UF-00” – Wiring and piping mismatch ..................................................................................................... 41
2.2.4. Others .......................................................................................................................................................... 41
2.3. Symptom based troubleshooting ............................................................................................................ 42
2.3.1. Indoor unit .................................................................................................................................................... 42
2.3.2. Outdoor unit ................................................................................................................................................. 42
2.3.3. System ......................................................................................................................................................... 42
2.3.4. Others .......................................................................................................................................................... 42
2.4. Component checklist ............................................................................................................................... 43
2.4.1. Indoor unit .................................................................................................................................................... 44
2.4.1.1. Fan motor ................................................................................................................................................. 44
2.4.2. Outdoor unit ................................................................................................................................................. 45
2.4.2.1. 4-way valve .............................................................................................................................................. 45
2.4.2.2. Compressor .............................................................................................................................................. 47
2.4.2.3. Electronic expansion valve ....................................................................................................................... 49
2.4.2.4. Fan motor ................................................................................................................................................. 51
2.4.2.5. High pressure sensor ............................................................................................................................... 52
2.4.2.6. Main PCB .................................................................................................................................................53
2.4.2.7. Pressure sensor ....................................................................................................................................... 54
2.4.2.8. Refrigerant thermistors ............................................................................................................................. 56
2.4.3. System ......................................................................................................................................................... 58
2.4.4. Others .......................................................................................................................................................... 58
2.5. Other capacity range ............................................................................................................................... 59
Part 3. Repair ............................................................................................................................61
3.1. Refrigerant repair procedures ................................................................................................................. 61
3.1.1. Refrigerant piping handling .......................................................................................................................... 61
3.1.2. Recovery procedure ..................................................................................................................................... 61
3.1.2.1. Outdoor unit casing .................................................................................................................................. 61
3.1.3. Refrigerant pump down ................................................................................................................................ 63
3.1.3.1. Small outdoor unit ....................................................................................................................................63
3.1.3.2. Large outdoor unit ....................................................................................................................................64
3.1.4. Piping repair procedures .............................................................................................................................. 64
3.2. Service tools ........................................................................................................................................... 65
3.3. Unit specific repair procedures ............................................................................................................... 66
3.3.1. Indoor unit .................................................................................................................................................... 67
3.3.2. Outdoor unit ................................................................................................................................................. 68
3.3.2.1. Basic removal ........................................................................................................................................... 68
3.3.2.2. Replacing switch box ...............................................................................................................................71
3.3.2.3. Replacing 4-way valve body .................................................................................................................... 73
3.3.2.4. Replacing 4-way valve coil ....................................................................................................................... 75
3.3.2.5. Replacing compressor .............................................................................................................................76
3.3.2.6. Replacing DC fan motor assembly ........................................................................................................... 79
3.3.2.7. Replacing expansion valve body .............................................................................................................. 81
3.3.2.8. Replacing expansion valve motor ............................................................................................................ 82
3.3.2.9. Replacing main PCB ................................................................................................................................84
3.3.2.10. Replacing propeller fan blade assembly ................................................................................................ 85
3.3.2.11. Replacing thermistors ............................................................................................................................ 87
3.3.2.12. Setting test mode for inverter checker ................................................................................................... 88
Page 4 4/04/17 | Version 1.1
RA R32 Split & multi split M-Series
ESIE16-02B |
Part 4. Maintenance .................................................................................................................89
4.1. Indoor unit ................................................................................................................................................89
4.1.1. General maintenance ................................................................................................................................... 89
4.2. Outdoor unit .............................................................................................................................................90
4.2.1. General maintenance outdoor unit ............................................................................................................... 90
Part 5. Appendix .......................................................................................................................91
5.1. Field setting ..............................................................................................................................................93
5.1.1. Indoor unit .................................................................................................................................................... 93
5.1.1.1. Indoor fan control during thermostat off in cooling ................................................................................... 93
5.1.1.2. Brightness setting of multi-coloured lamp of the indoor unit .................................................................... 93
5.1.1.3. ON/OFF button on the indoor unit ............................................................................................................ 93
5.1.2. Outdoor unit .................................................................................................................................................. 94
5.1.2.1. Facility setting for outdoor split units ........................................................................................................ 94
5.1.2.2. Multi split outdoor ..................................................................................................................................... 94
5.1.3. Remote controller ......................................................................................................................................... 96
5.2. Detailed information setting mode ...........................................................................................................97
5.2.1. Indoor unit .................................................................................................................................................... 97
5.2.2. Outdoor unit .................................................................................................................................................. 97
5.2.3. Remote controller ......................................................................................................................................... 97
5.3. Wiring diagram .........................................................................................................................................98
5.3.1. Indoor unit .................................................................................................................................................... 98
5.3.2. Outdoor unit .................................................................................................................................................. 99
5.3.2.1. 2MXM50M ................................................................................................................................................ 99
5.3.2.2. 3MXM68M ................................................................................................................................................ 99
5.3.2.3. 4MXM-M ................................................................................................................................................ 100
5.3.2.4. 5MXM-M ................................................................................................................................................ 100
5.3.2.5. RXJ20-35M ............................................................................................................................................ 101
5.3.2.6. RXJ50M ................................................................................................................................................. 101
5.3.2.7. RXM20-35M ........................................................................................................................................... 101
5.3.2.8. RXM42-50M ........................................................................................................................................... 102
5.3.2.9. RXM60-71M ........................................................................................................................................... 102
5.3.2.10. RXM71M .............................................................................................................................................. 103
5.3.3. Field wiring ................................................................................................................................................. 103
5.4. Piping diagram .......................................................................................................................................104
5.4.1. Indoor unit .................................................................................................................................................. 104
5.4.2. Outdoor unit ................................................................................................................................................104
5.4.2.1. 2MXM40M .............................................................................................................................................. 104
5.4.2.2. 3MXM68M .............................................................................................................................................. 105
5.4.2.3. 4MXM68M .............................................................................................................................................. 105
5.4.2.4. 5MXM-M ................................................................................................................................................ 106
5.4.2.5. RXJ20-35M ............................................................................................................................................ 106
5.4.2.6. RXJ50M ................................................................................................................................................. 107
5.4.2.7. RXM20-35M ........................................................................................................................................... 107
5.4.2.8. RXM42-50M ........................................................................................................................................... 108
5.4.2.9. RXM60 ................................................................................................................................................... 108
5.4.2.10. RXM71M .............................................................................................................................................. 109
5.5. Component overview of unit ..................................................................................................................110
5.5.1. Indoor unit .................................................................................................................................................. 110
5.5.2. Outdoor unit ................................................................................................................................................110
5.6. Product specific information ...................................................................................................................111
5.6.1. Error codes ................................................................................................................................................. 111
5.6.1.1. “E7-00” – Fan motor abnormality ........................................................................................................... 111
5.6.1.2. “EA-00” – Malfunction of 4-way valve .................................................................................................... 111
5.6.1.3. “F3-00” – Discharge pipe temperature abnormality ............................................................................... 111
5.6.1.4. “L3-00” – Switch box temperature abnormality ...................................................................................... 111
5.6.1.5. “L4-00” – Inverter radiating fin temperature abnormality ........................................................................ 111
5.6.2. Component checklist .................................................................................................................................. 111
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RA R32 Split & multi split M-Series
5.7. Switch box ............................................................................................................................................. 111
5.7.1. Indoor unit .................................................................................................................................................. 111
5.7.2. Outdoor unit ............................................................................................................................................... 111
5.8. Field information report ......................................................................................................................... 112
Page 6 4/04/17 | Version 1.1
RA R32 Split & multi split M-Series
ESIE16-02B |
Figure 2-1: Service display location ..........................................................................................................................18
Figure 3-1: 1 service port at the stop valves .............................................................................................................62
Figure 3-2: 3 service ports at the stop valves ...........................................................................................................63
Figure 3-3: Removing refrigerant connection cover ..................................................................................................68
Figure 3-4: Removing the top plate ...........................................................................................................................69
Figure 3-5: Removing the front plate .........................................................................................................................70
Figure 3-6: Removing the compressor sound insulation ...........................................................................................70
Figure 3-7: Removing the switch box ........................................................................................................................72
Figure 3-8: Removing the 4-way valve ......................................................................................................................73
Figure 3-9: Removing the 4-way valve coil ...............................................................................................................75
Figure 3-10: Removing the compressor ....................................................................................................................77
Figure 3-11: Removing the DC fan motor assembly .................................................................................................80
Figure 3-12: Removing the expansion valve .............................................................................................................81
Figure 3-13: Removing the expansion valve motor ...................................................................................................82
Figure 3-14: Locking the expansion valve motor ......................................................................................................83
Figure 3-15: Removing the main PCB ......................................................................................................................84
Figure 3-16: Removing the DC fan motor assembly .................................................................................................86
Figure 3-17: Replacing a thermistor ..........................................................................................................................87
Figure 5-1: How to change fan OFF to ON when in cooling thermo off ....................................................................93
Figure 5-2: Jumper settings ......................................................................................................................................94
Figure 5-3: Service PC board wiring error check switch location ..............................................................................94
Figure 5-4: Dip switch location ..................................................................................................................................95
Figure 5-5: S15 connector location ...........................................................................................................................96
Figure 5-6: Jumper location ......................................................................................................................................96
Figure 5-7: Wiring diagram - outdoor unit 2MXM50M ...............................................................................................99
Figure 5-8: Wiring diagram - outdoor unit 3MXM68M ...............................................................................................99
Figure 5-9: Wiring diagram - outdoor unit 4MXM-M ................................................................................................100
Figure 5-10: Wiring diagram - outdoor unit 2MXM50M ...........................................................................................100
Figure 5-11: Wiring diagram - outdoor unit RXJ20-35M .........................................................................................101
Figure 5-12: Wiring diagram - outdoor unit RXJ50M ...............................................................................................101
Figure 5-13: Wiring diagram - outdoor unit RXJ20-35M .........................................................................................101
Figure 5-14: Wiring diagram - outdoor unit RXM42-50M ........................................................................................102
Figure 5-15: Wiring diagram - outdoor unit RXM60-71M ........................................................................................102
Figure 5-16: Wiring diagram - outdoor unit RXM71M .............................................................................................103
Figure 5-17: Piping diagram - outdoor unit 2MXM40M ...........................................................................................104
Figure 5-18: Piping diagram - outdoor unit 3MXM68M ............................................................................
Figure 5-19:
Piping diagram - outdoor unit 4MXM68M ...........................................................................................105
...............105
Figure 5-20: Piping diagram - outdoor unit 2MXM50M ...........................................................................................106
Figure 5-21: Piping diagram - outdoor unit RXJ20-35M ..........................................................................................106
Figure 5-22: Piping diagram - outdoor unit RXJ50M ...............................................................................................107
Figure 5-23: Piping diagram - outdoor unit RXJ20-35M ..........................................................................................107
Figure 5-24: Piping diagram - outdoor unit RXM42-50M ........................................................................................108
Figure 5-25: Piping diagram - outdoor unit RXM60 .................................................................................................108
4/04/17 | Version 1.0 Page 7
RA R32 Split & multi split M-Series
ESIE16-02B |
Figure 5-26: Piping diagram - outdoor unit RXM71M ............................................................................................. 109
Figure 5-27: Component overview - outdoor unit ................................................................................................... 110
Page 8 4/04/17 | Version 1.0
RA R32 Split & multi split M-Series
ESIE16-02B | Part 1. Introduction 1.1. Version log
Part 1. Introduction
This part contains the following chapters:
Version log..............................................................................................................................................................................................9
Safety precautions................................................................................................................................................................................10
General operation.................................................................................................................................................................................13
How to use ...........................................................................................................................................................................................14
1.1. Version log
Version code Description Date
ESIE16-02A Document release 21/03/2017
ESIE16-02B Manual also applicable for MXM-N 04/04/2017
4/04/17 | Version 1.0 Page 9
RA R32 Split & multi split M-Series
ESIE16-02B | Part 1. Introduction 1.2. Safety precautions
1.2. Safety precautions
The precautions described in this document cover very important topics, follow them carefully.
All activities described in the service manual must be performed by an authorized person.
If you are not sure how to install, operate or service the unit, contact your dealer.
In accordance with the applicable legislation, it might be necessary to provide a logbook with the product containing at least: information on maintenance, repair work, results of tests, stand-by periods, …
Also, at least, following information must be provided at an accessible place at the product:
• Instructions for shutting down the system in case of an emergency
• Name and address of fire department, police and hospital
• Name, address and day and night telephone numbers for obtaining service
In Europe, EN378 provides the necessary guidance for this logbook.
1.2.1. Meaning of symbols
WARNING
Indicates a situation that could result in death or serious injury.
WARNING: RISK OF ELECTROCUTION
Indicates a situation that could result in electrocution.
WARNING: RISK OF BURNING
Indicates a situation that could result in burning because of extreme hot or cold temperatures.
WARNING: RISK OF EXPLOSION
Indicates a situation that could result in explosion.
WARNING: RISK OF POISONING
Indicates a situation that could result in poisoning.
WARNING: RISK OF FIRE
Indicates a situation that could result in fire.
CAUTION
Indicates a situation that could result in equipment or property damage.
INFORMATION
Indicates useful tips or additional information.
1.2.2. Warnings
WARNING
Improper installation or attachment of equipment or accessories could result in electric shock, short-circuit, leaks, fire or other damage to the equipment. Only use accessories, optional equipment and spare parts made or approved by Dai­kin.
Page 10 4/04/17 | Version 1.0
RA R32 Split & multi split M-Series
ESIE16-02B | Part 1. Introduction 1.2. Safety precautions
WARNING
Make sure installation, testing and applied materials comply with applicable legislation (on top of the instructions described in the Daikin documentation).
WARNING
Make sure the work site environment is clean and safe to work in. Beware of spilled fluids, like water, oil or other sub­stances. Protect bystanders from injury and property from possible damage cause by service works.
WARNING
Wear adequate personal protective equipment (protective gloves, safety glasses,…) when installing, maintaining or ser­vicing the system.
WARNING
Tear apart and throw away plastic packaging bags so that nobody, especially children, can play with them. Possible risk: suffocation.
WARNING
Do NOT touch the air inlet or aluminium fins of the unit.
WARNING
• Do NOT place any objects or equipment on top of the unit.
• Do NOT sit, climb or stand on the unit.
WARNING
During tests, NEVER pressurize the product with a pressure higher than the maximum allowable pressure (as indicated on the nameplate of the unit).
WARNING
• Never mix different refrigerants or allow air to enter the refrigerant system.
• Never charge recovered refrigerant from another unit. Use recovered refrigerant only on the same unit where it was recovered from, or have it recycled at a certified facility.
WARNING: RISK OF FIRE
• When reconnecting a connector to the PCB, do not apply force or damage the connector or the connector pins on the PCB.
WARNING: RISK OF BURNING
• Do NOT touch the refrigerant piping, water piping or internal parts during and immediately after operation. It could be too hot or too cold. Give it time to return to normal temperature. If you must touch it, wear protective gloves.
• Do NOT touch any accidental leaking refrigerant.
WARNING
Always recover the refrigerants. Do NOT release them directly into the environment. Use a recovery pump to evacuate the installation.
Take sufficient precautions in case of refrigerant leakage. If refrigerant gas leaks, ventilate the area immediately.
Possible risks:
• Excessive refrigerant concentrations in a closed room can lead to oxygen deficiency.
• Toxic gas may be produced if refrigerant gas comes into contact with fire.
Where applicable, pump down the system and close the service valve, before leaving the site if leak was not repaired, to avoid further leaking of the refrigerant.
WARNING: RISK OF ELECTROCUTION
• Turn OFF all power supply before removing the switch box cover, connecting electrical wiring or touching electrical parts. Where applicable, stop the equipment's operation first and allow (refrigerant) pressure to equalize, before turning OFF the power. Disconnect the power supply for more than 1 minute, and measure the voltage at the terminals of main circuit capacitors or electrical components before servicing. The voltage must be less than 50 V DC before you can touch electrical components. For the location of the terminals, refer to "Wiring diagram" on page 98.
• Do NOT touch electrical components with wet hands.
• Do NOT leave the unit unattended when the service cover is removed.
• Protect electric components from getting wet while the service cover is opened.
4/04/17 | Version 1.0 Page 11
RA R32 Split & multi split M-Series
ESIE16-02B | Part 1. Introduction 1.2. Safety precautions
WARNING
• Only use copper wires.
• All field wiring must be performed in accordance with the wiring diagram and installation manual supplied with the product.
• If the power cable and lead wires have scratches or deteriorated, be sure to replace them. Damaged cable and wires may cause an electrical shock, excessive heat generation or fire.
• Secure all terminal connections and provide proper routing for cables, both inside and outside the switchbox.
• NEVER squeeze bundled cables and make sure they do not come in contact with the piping and sharp edges.
• Make sure no external pressure is applied to the terminal connections.
• Make sure to check the earth wiring. Do NOT earth the unit to a utility pipe, surge absorber, or telephone earth. Improper earth wiring may cause electrical shock.
• Make sure to use a dedicated power circuit. NEVER use a power supply shared by another appliance.
• Make sure to check the required fuses and/or circuit breakers before starting works.
WARNING
• After finishing the electrical work, confirm that each electrical component and terminal inside the electrical components box is connected securely.
• Make sure all covers are closed before starting the unit again.
1.2.3. Cautions
CAUTION
Provide adequate measures to prevent that the unit can be used as a shelter by small animals. Small animals that make contact with electrical parts can cause malfunctions, smoke or fire.
CAUTION
• Make sure water quality complies with EU directive 98/83 EC.
• Check the system for leaks after each repair/modification of the water side.
• Check drainage system(s) after repairs.
• Be careful when tilting units as water may leak.
1.2.4. Information
INFORMATION
Make sure refrigerant piping installation complies with applicable legislation. In Europe, EN378 is the applicable stand­ard.
INFORMATION
Make sure the field piping and connections are not subjected to stress.
Page 12 4/04/17 | Version 1.0
RA R32 Split & multi split M-Series
ESIE16-02B | Part 1. Introduction 1.3. General operation
1.3. General operation
• These split units are used for comfort cooling and are equipped with an inverter.
• The rotation speed rps (= rotation per second) of the inverter driven compressor, modulated by the inverter, can be varied according the required capacity in the room.
• The compressor capacity step is changed in order to reach target compression ratio. The target compression ratio is calculated from deviation between actual and target condensation and evaporation temperature.
• Tc (condensing temperature) is used in heating mode.
• Te (evaporation temperature) is used if any indoor unit operates in cooling mode.
• The evaporating temperature in the heat exchanger is controlled by the electronic expansion valve.
• When indoor unit is selecting heating mode, discharge gas is supplied by the outdoor unit to the indoor unit.
• When indoor unit is selecting cooling mode, liquid refrigerant is supplied by the outdoor unit to the indoor unit.
1. Compressor 4. Outdoor heat exchanger
2. Indoor heat exchanger 5. 4-way valve
3. Expansion valve 6. Stop valves
4/04/17 | Version 1.0 Page 13
RA R32 Split & multi split M-Series
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ESIE16-02B | Part 1. Introduction 1.4. How to use
1.4. How to use
1.4.1. Interactive information flow
This Daikin product Service Manual is intended for professional use only. The actions described hereafter, are only to be performed by qualified and certified persons, taking into account the safety precautions mentioned in this manual and the local regulations as well.
By following the diagram below, the reader can find the relevant information related to his/her task. The digital (pdf) version of this book allows direct page access through all active links. When Adobe Acrobat Reader is used, the <Alt> + <Back Arrow> keys or the arrow in the top right-hand corner of this page can be used to return to the previously viewed page.
?
Is this your 1st encounter with this particular unit?
How to retrieve
Error Codes
YES
PART 2
Troubleshooting
?
Is an Error Code
displayed?
NO
NO
?
What do you need to do?
PART 3
Repair
YES
PART 4
Maintenance
General
operation
Installation
Refer to:
Installation Manual
or
Installer Reference Guide
Error Code based
troubleshooting
Component
checklist
?
Is repair necessary?
e
Page 14 4/04/17 | Version 1.0
Symptom based troubleshooting
RA R32 Split & multi split M-Series
ESIE16-02B | Part 1. Introduction 1.4. How to use
1.4.2. Parts of the book
This Daikin product Service Manual is intended for professional use only. The actions described hereafter, are only to be performed by qualified and certified persons, taking into account the safety precautions mentioned in this manual and the local regulations as well.
As can be observed from the Table of Contents, this manual is split up into several chapters:
1.4.2.1. The introduction chapter
The chapter "Introduction" on page 9 includes the safety precautions, this topic and the general operation description of the product(s) this manual refers to.
1.4.2.2. The troubleshooting chapter
The chapter "Troubleshooting" on page 17 not only deals with the methods to recognize and resolve occurring error codes; it also describes the methods how to solve a problem that does not immediately trigger an error code. Such problems are referred to as 'symptom based'. Both the error code based and symptom based troubleshooting tables, indicate possible causes, the necessary checks and in case required, how to repair. The possible causes have been sorted to probability of occurrence and speed of execution.
1.4.2.3. The repair chapter
The chapter "Repair" on page 61 handles the removal and replacement of the major components in the product and discusses cleaning methods as well if applicable, such as for filters. Where applicable, refrigerant handling precautions are mentioned for certain actions; please consider these carefully for your own safety.
1.4.2.4. The maintenance chapter
The chapter "Maintenance" on page 89 of this manual describes the maintenance intervals and procedures to be performed on the product. Remember that a well maintained product, is a more reliable and efficient product.
1.4.2.5. Appendices
Finally, the service manual provides in chapter "Appendix" on page 91 valuable reference data such as piping/wiring diagrams, field settings overview and a checklist to be filled in when you need to escalate an issue to your dealer.
1.4.3. Contact information
This manual has been made with much care and effort. Use it in your daily jobs, as it has been made for you.
Despite our efforts, there is always a chance some cleric or other mistake has been made during the creation of this manual. We kindly ask you to send the found mistakes, or remarks for improvement, to the no-reply email address
servicemanual@daikineurope.com.
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RA R32 Split & multi split M-Series
ESIE16-02B | Part 1. Introduction 1.4. How to use
Page 16 4/04/17 | Version 1.0
RA R32 Split & multi split M-Series
ESIE16-02B | Part 2. Troubleshooting 2.1. Error codes check
Part 2. Troubleshooting
This part contains the following chapters:
Error codes check ................................................................................................................................................................................17
Error based troubleshooting.................................................................................................................................................................20
Symptom based troubleshooting ..........................................................................................................................................................42
Component checklist............................................................................................................................................................................43
Other capacity range ............................................................................................................................................................................59
2.1. Error codes check
2.1.1. Error codes via remote controller
2.1.1.1. General
If operation stops due to malfunction, the remote controller’s operation LED blinks, and malfunction code is displayed. (Even if stop operation is carried out, malfunction contents are displayed when inspection mode is entered.) The malfunction code enables you to tell what kind of malfunction caused operation to stop.
2.1.1.2. How to reset error codes
When the problem is solved, you can reset the error by pushing the ON/OFF-button.
2.1.1.3. History of error codes
Not applicable for this remote controller.
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RA R32 Split & multi split M-Series
1
ESIE16-02B | Part 2. Troubleshooting 2.1. Error codes check
2.1.2. Error codes via outdoor unit PCB
2.1.2.1. How to retrieve error codes
Troubleshooting via the service display.
GREEN RED GREEN FLASHING: NORMAL
MICRO-
COMPUTER
NORMAL
LED-A
MALFUNCTION DETECTION
LED1LED2LED3LED4LED
c xxxxx cwxwwx cwxwxx cxwwxx cxwxwx c wwxxx cwwxwx cxxxwx cxxwxx cxxwwx cwxxwx c wxxxx cwwwxx cwwwwx c xwxxx w c
— — — — — (Note 1)
— — — — — power supply fault
5
normal -> check indoor unit
high pressure protector activated or freeze-up in operating unit, or stand-by unit
overload relay activated or high discharge pipe temperature
faulty compressor start
input overcurrent
thermistor or ct abnormality
high temperature switchbox
high temperature at inverter circuit heatsink
output overcurrent
refrigerant shortage
low voltage to main circuit or over voltage to main circuit
reversing solenoid valve switching failure. * or high pressure switching failure
faulty outdoor unit pcb
fan motor fault
wiring error check unfinished
RED OFF: NORMAL
* MAY NOT BE APPLICABLE DEPENDING ON THE MODEL
DIAGNOSIS
w
x
ON
OFF
c
—
FLASHING
ANY STATUS
Note 1: Turn the power off and on again
Figure 2-1: Service display location
1. Service monitor LEDs
2.1.2.2. How to reset error codes
1. When the problem is solved, perform a power reset
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ESIE16-02B | Part 2. Troubleshooting 2.1. Error codes check
2.1.2.3. History of error codes
Not applicable
2.1.2.4. Content of retry
Not applicable
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RA R32 Split & multi split M-Series
ESIE16-02B | Part 2. Troubleshooting 2.2. Error based troubleshooting
2.2. Error based troubleshooting
Overview of error codes:
Indoor unit............................................................................................................................................................................................ 21
“A1-00” – PCB abnormality...................................................................................................................................................... 21
“A1-01” – PCB abnormality...................................................................................................................................................... 21
“A5-00” – Freeze-up protection / Heating peak cut control...................................................................................................... 22
“A6-00” – Fan motor abnormality............................................................................................................................................. 22
“C4-00” – Liquid pipe thermistor for heat exchanger abnormality ........................................................................................... 23
“C7-00” – Front panel open/close fault.................................................................................................................................... 23
“C9-00” – Suction air thermistor abnormality........................................................................................................................... 23
“UH-00” – Anti-icing function in other room(s) ......................................................................................................................... 24
Outdoor unit......................................................................................................................................................................................... 25
“E1-00” – Outdoor unit PCB abnormality................................................................................................................................. 25
“E3-00” – Discharge pressure abnormality.............................................................................................................................. 25
“E5-00” – Compressor motor lock or overheated .................................................................................................................... 26
“E6-00” – Compressor motor lock ........................................................................................................................................... 26
“E7-00” – Fan motor abnormality............................................................................................................................................. 27
“E8-00” – Compressor overcurrent detection .......................................................................................................................... 28
“EA-00” – 4-way valve abnormality.......................................................................................................................................... 28
“F3-00” – Discharge pipe temperature abnormality ................................................................................................................. 29
“F6-00” – High pressure abnormality or refrigerant overcharge .............................................................................................. 29
“H0-00” – Compressor sensor system abnormality ................................................................................................................. 30
“H6-00” – Position detection sensor abnormality..................................................................................................................... 30
“H8-00” – Compressor input (CT) system abnormality............................................................................................................ 31
“H9-00” – Outdoor air temperature thermistor abnormality ..................................................................................................... 31
“J3-00” – Discharge pipe thermistor abnormality..................................................................................................................... 32
“J5-00” – Suction pipe thermistor abnormality......................................................................................................................... 32
“J6-00” – Outdoor heat exchanger thermistor abnormality...................................................................................................... 32
“J8-00” – Liquid pipe thermistor abnormality ........................................................................................................................... 33
“J9-00” – Gas pipe thermistor abnormality .............................................................................................................................. 33
“L1-00” – Outdoor main PCB abnormality ............................................................................................................................... 34
“L3-00” – Switch box temperature abnormality........................................................................................................................ 34
“L4-00” – Inverter radiating fin temperature abnormality ......................................................................................................... 35
“L5-00” – Inverter instantaneous overcurrent (AC output) ....................................................................................................... 36
“P4-00” – Radiating fin temperature sensor abnormality......................................................................................................... 36
System................................................................................................................................................................................................. 38
“U0-00” – Refrigerant shortage................................................................................................................................................ 38
“U2-00” – Power supply abnormality or instantaneous power failure ...................................................................................... 38
“U4-00” – Transmission abnormality between indoor unit and outdoor unit ............................................................................ 39
“U7-00” – Transmission outdoor unit-outdoor unit abnormality ............................................................................................... 40
“UA-00” – Improper combination of indoor unit and outdoor unit ............................................................................................ 40
“UF-00” – Wiring and piping mismatch .................................................................................................................................... 41
Others ................................................................................................................................................................................................. 41
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RA R32 Split & multi split M-Series
ESIE16-02B | Part 2. Troubleshooting 2.2. Error based troubleshooting
2.2.1. Indoor unit
2.2.1.1. “A1-00” – PCB abnormality
Trigge r Effect Reset
The system cannot set the internal set­tings
Possible cause Check Corrective action
Wrong models interconnected Check if unit combination is official.
Faulty wiring. Check the connection of all terminals by
Faulty or disturbance of the power supply (imbalance > 10%). Power drop. Short cir­cuit.
Faulty indoor PCB. Check if error still occurs after turning off
Unit will stop operating. Power reset via outdoor unit.
Install compatible models.
Refer to ‘Combination database’.
disconnecting and reconnecting all termi­nals.
Check if the power supply is conform with regulations. No fluctuations in frequency.
power and turning it back on again.
Check if the indoor PCB receives power.
Check if the HAP LED is blinking in regu­lar intervals.
Check if the correct spare part is installed.
Check the wiring to indoor PCB.
Replace wire harness/terminal when con­nection is not OK.
Adjust power supply when required. Power reset via outdoor unit.
Adjust power to the indoor PCB.
Replace indoor PCB when HAP LED is not blinking in regular intervals.
Install correct spare part or update indoor PCB.
Adjust wiring to indoor PCB when required.
2.2.1.2. “A1-01” – PCB abnormality
Trigge r Effect Reset
The system cannot set the internal set­tings
Possible cause Check Corrective action
Wrong models interconnected Check if unit combination is official.
Faulty wiring. Check the connection of all terminals by
Faulty or disturbance of the power supply (imbalance > 10%). Power drop. Short cir­cuit.
Faulty indoor PCB. Check if error still occurs after turning off
Unit will stop operating. Power reset via outdoor unit.
Install compatible models.
Refer to ‘Combination database’.
disconnecting and reconnecting all termi­nals.
Check if the power supply is conform with regulations. No fluctuations in frequency.
power and turning it back on again.
Check if the indoor PCB receives power.
Check if the HAP LED is blinking in regu­lar intervals.
Check if the correct spare part is installed.
Check the wiring to indoor PCB.
Replace wire harness/terminal when con­nection is not OK.
Adjust power supply when required. Power reset via outdoor unit.
Adjust power to the indoor PCB.
Replace indoor PCB when HAP LED is not blinking in regular intervals.
Install correct spare part or update indoor PCB.
Adjust wiring to indoor PCB when required.
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ESIE16-02B | Part 2. Troubleshooting 2.2. Error based troubleshooting
2.2.1.3. “A5-00” – Freeze-up protection / Heating peak cut control
Trigge r Effect Reset
• during cooling operation, indoor heat exchanger temperature is below 0°C (freeze-up protection control).
• during heating operation, indoor heat exchanger is above 65°C (heating peak-cut control).
Possible cause Check Corrective action
Air short-circuit. Check if the airflow around the unit is OK
Clogged air filter. Check if the air filter is clogged. Clean the air filter.
Dust accumulation on indoor heat exchanger.
Faulty indoor heat exchanger thermistor. Check indoor heat exchanger thermistor. Replace indoor heat exchanger thermistor
Faulty indoor PCB. Check if error still occurs after turning off
Unit will stop operating. Automatic reset when temperature is
and there are no obstructions.
Check if indoor heat exchanger is dirty/dusty.
power and turning it back on again.
Check if the indoor PCB receives power.
Check if the HAP LED is blinking in regu­lar intervals.
Check if the correct spare part is installed.
Check the wiring to indoor PCB.
within range.
Remove obstruction.
Clean the indoor heat exchanger.
when required.
Adjust power to the indoor PCB.
Replace indoor PCB when HAP LED is not blinking in regular intervals.
Install correct spare part or update indoor PCB.
Adjust wiring to indoor PCB when required.
2.2.1.4. “A6-00” – Fan motor abnormality
Trigge r Effect Reset
The rotation speed of the fan motor is not detected while the output voltage to the fan is at its maximum.
Possible cause Check Corrective action
Faulty indoor PCB. Check if error still occurs after turning off
Faulty indoor fan motor. Check the fan motor.
Indoor fan motor locked. Switch of the power.
More info:
Check procedures Replacing procedures
"Fan motor" on page 44
Unit will stop operating. Power reset via outdoor unit.
power and turning it back on again.
Check if the indoor PCB receives power.
Check if the HAP LED is blinking in regu­lar intervals.
Check if the correct spare part is installed.
Check the wiring to indoor PCB.
Check fan motor connections and wiring.
Turn fan manually.
Adjust power to the indoor PCB.
Replace indoor PCB when HAP LED is not blinking in regular intervals.
Install correct spare part or update indoor PCB.
Adjust wiring to indoor PCB when required.
Replace fan motor when required.
Adjust wiring when required.
Replace fan motor when the fan does not turn smoothly.
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RA R32 Split & multi split M-Series
ESIE16-02B | Part 2. Troubleshooting 2.2. Error based troubleshooting
2.2.1.5. “C4-00” – Liquid pipe thermistor for heat exchanger abnormality
Trigge r Effect Reset
Thermistor input is > 4.96 V or < 0.04 V during compressor operation.
Possible cause Check Corrective action
Faulty liquid pipe thermistor. Check liquid pipe thermistor. Replace liquid pipe thermistor when
Faulty indoor unit main PCB. Check if error still occurs after turning off
More info:
Check procedures Replacing procedures
"Refrigerant thermistors" on page 56
Unit will stop operating. Power reset via outdoor unit.
required.
power and turning it back on again.
Check if the indoor PCB receives power.
Check if the HAP LED is blinking in regu­lar intervals.
Check if the correct spare part is installed.
Check the wiring to indoor PCB.
Adjust the power to the indoor main PCB.
Replace indoor main PCB when HAP LED is not blinking in regular intervals.
2.2.1.6. “C7-00” – Front panel open/close fault
Trigge r Effect Reset
Shutter limit switch not activated or faulty. Unit will stop operating when error occurs
2 times.
Power reset via outdoor unit.
Possible cause Check Corrective action
Foreign substance in the blow port. Check blow port for foreign material. Remove foreign material when required.
Faulty shutter limit switch. Check the limit switch continuity. Replace the limit switch when continuity is
Faulty wire harness. Check the wire harness wiring.
Check the wire harness connection.
Faulty shutter motor. Check if motor operates after opening the
shutter and power reset.
Faulty shutter sealing. Check if shutter goes back open automat-
ically after closing.
Shutter is deformed. Check if the error is still active after clos-
ing the shutter.
not good.
Reconnect wire harness when required.
Perform a power reset, if shutter valve does not close after power reset, replace wire harness.
Replace indoor unit main PCB when required.
Replace sealing material when required.
Replace shutter panel when required.
2.2.1.7. “C9-00” – Suction air thermistor abnormality
Trigge r Effect Reset
Resistance value is out of range.
T measured < -43.6°C or > 90°C.
4/04/17 | Version 1.1 Page 23
Unit will stop operating. Automatic reset when resistance is within
range.
RA R32 Split & multi split M-Series
ESIE16-02B | Part 2. Troubleshooting 2.2. Error based troubleshooting
Possible cause Check Corrective action
Faulty suction air thermistor. Check suction air thermistor. Replace suction air thermistor when
Faulty indoor PCB. Check if error still occurs after turning off
power and turning it back on again.
Check if the indoor PCB receives power.
Check if the HAP LED is blinking in regu­lar intervals.
Check if the correct spare part is installed.
Check the wiring to indoor PCB.
required.
Adjust power to the indoor PCB.
Replace indoor PCB when HAP LED is not blinking in regular intervals.
Install correct spare part or update indoor PCB.
Adjust wiring to indoor PCB when required.
More info:
Check procedures Replacing procedures
"Refrigerant thermistors" on page 56
2.2.1.8. “UH-00” – Anti-icing function in other room(s)
Trigge r Effect Reset
A wrong connection is detected by check­ing the combination of the indoor and out­door unit on the CPU
Operation halt due to freeze up prevention in other room/unspecified internal or externa voltages/mismatch indoor and outdoor units
Auto reset after freeze up prevention is finished. Unit cannot restart before mis­match is removed.
Possible cause Check Corrective action
Freeze up prevention in other room. Indoor fan is not operating while the error
is displayed.
Mismatch of outdoor-indoor units. Verify connection on combination data-
base.
Unspecified voltages. Check supply voltage. Adjust when required.
See error A5.
Replace indoor units when required.
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RA R32 Split & multi split M-Series
ESIE16-02B | Part 2. Troubleshooting 2.2. Error based troubleshooting
2.2.2. Outdoor unit
2.2.2.1. “E1-00” – Outdoor unit PCB abnormality
Trigge r Effect Reset
Outdoor main PCB detects that EEPROM is abnormal.
Possible cause Check Corrective action
Faulty outdoor unit main PCB. Check if the HAP LED is blinking in regu-
Faulty capacity adapter on outdoor main PCB installed.
External factor (e.g. electrical noise) (cause when error is reset after power reset, and error happens again after a while).
Faulty outdoor fan motor. Check the fan motor.
Faulty or disturbance of the power supply (imbalance > 10%). Power drop. Short cir­cuit.
Unit will stop operating. Manual reset via user interface.
Power reset via outdoor unit.
lar intervals.
Check if the correct spare part is installed.
Check if the outdoor main PCB receives power.
Check if the correct capacity adapter is used.
Check for source which could cause elec­trical interference.
Check fan motor connections and wiring.
Check if the power supply is conform with regulations. No fluctuations in frequency.
Restore the power to the outdoor main PCB.
Replace outdoor main PCB when HAP LED is not blinking in regular intervals.
Replace capacity adapter when required.
Replace fan motor when required.
Adjust wiring when required.
Adjust power supply when required.
Power reset via outdoor unit.
2.2.2.2. “E3-00” – Discharge pressure abnormality
Trigge r Effect Reset
Discharge pressure above 4.15 MPa. Unit will stop operating. Automatic reset when high pressure drops
Possible cause Check Corrective action
Stop valve is closed. Check stop valve. Open stop valve when required.
Blocked heat exchangers. Are the heat exchangers clean? Clean heat exchangers.
Insufficient airflow. Are the fans operating? Repair fan.
Non condensables in refrigerant. Check for non condensables in refriger-
Disconnected HPS wire harness terminal on the PCB.
Disconnected HPS wire harness terminal on the HPS.
Defective outdoor PCB. Verify resistance of the wire harness ter-
Broken high pressure sensor wire har­ness.
Defective high pressure switch. Check the resistance of the high pressure
ant.
Verify connection wire harness terminal on PCB.
Verify connection wire harness terminal on HPS.
minal on the outdoor PCB.
Verify resistance of the wire harness. If resistance = infinity, replace wire har-
switch.
below 3.2 MPa.
In case of suspicion of non condensables, recover, vacuum and recharge with virgin refrigerant.
Reconnect the terminal.
Reconnect the terminal(s).
If nearly 0 Ohm, replace outdoor PCB.
ness.
If resistance = infinity, replace high pres­sure switch.
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RA R32 Split & multi split M-Series
ESIE16-02B | Part 2. Troubleshooting 2.2. Error based troubleshooting
2.2.2.3. “E5-00” – Compressor motor lock or overheated
Trigge r Effect Reset
Compressor overload is detected. Unit will stop operating. Automatic reset if the unit runs for 60 sec-
Possible cause Check Corrective action
Faulty discharge pipe thermistor. Check discharge pipe thermistor. Replace discharge pipe thermistor when
Faulty outdoor fan motor. Check the fan motor.
Check fan motor connections and wiring.
Faulty overload protection. Check the overload protection.
Check the overload protection connec­tions and wiring.
Faulty expansion valve. Check the expansion valve. Replace the expansion valve body or
Faulty 4-way valve. Check the 4-way valve. Replace the 4-way valve coil or body
Faulty outdoor unit main PCB. Check if the HAP LED is blinking in regu-
Faulty power module = faulty outdoor inverter PCB.
Refrigerant shortage. Check for refrigerant shortage. Refer to
Humidity in refrigerant (ice formation in expansion valve).
Non condensables in refrigerant. Check for non condensables in refriger-
Stop valve is closed. Check stop valve. Open stop valve when required.
lar intervals.
Check if the correct spare part is installed.
Check if the outdoor main PCB receives power.
Check outdoor inverter PCB.
Check if the HAP LED is blinking in regu­lar intervals.
Check if the correct spare part is installed.
the nameplate for the correct charge.
Check for humidity in the refrigerant. In case of suspicion of humidity, recover,
ant.
onds without error.
required.
Replace fan motor when required.
Adjust wiring when required.
Replace the overload protection when required.
Adjust wiring when required.
motor when required.
when required.
Restore the power to the outdoor main PCB.
Replace outdoor main PCB when HAP LED is not blinking in regular intervals.
Restore the power to the outdoor inverter PCB.
Replace the outdoor inverter PCB when required.
Charge the correct refrigerant amount when required.
vacuum and recharge with virgin refriger­ant.
In case of suspicion of non condensables, recover, vacuum and recharge with virgin refrigerant.
2.2.2.4. “E6-00” – Compressor motor lock
Trigge r Effect Reset
The motor rotor does not rotate when the compressor is energized.
Possible cause Check Corrective action
Faulty discharge thermistor. Check the discharge thermistor. Replace discharge thermistor when
Refrigerant shortage. Check for refrigerant shortage. Refer to
Humidity in refrigerant (ice formation in expansion valve).
Page 26 4/04/17 | Version 1.1
Unit will not stop operating. Automatic reset after a continuous run for
Unit will stop operating. Manual reset via user interface.
the nameplate for the correct charge.
Check for humidity in the refrigerant. In case of suspicion of humidity, recover,
about 10 min.
required.
Charge the correct refrigerant amount when required.
vacuum and recharge with virgin refriger­ant.
RA R32 Split & multi split M-Series
ESIE16-02B | Part 2. Troubleshooting 2.2. Error based troubleshooting
Possible cause Check Corrective action
Non condensables in refrigerant. Check for non condensables in refriger-
Stop valve is closed. Check stop valve. Open stop valve when required.
Refrigerant circuit is clogged (HP - LP > 0,26 MPa).
Faulty compressor. Check compressor.
Compressor turned off too fast. Wait for guard timer.
Faulty outdoor unit main PCB. Check if the HAP LED is blinking in regu-
Faulty outdoor inverter PCB. Check outdoor inverter PCB.
Faulty 4-way valve. Check the 4-way valve. Replace the 4-way valve coil or body
Faulty expansion valve. Check the expansion valve. Replace the expansion valve body or
ant.
Check for possible blockage (blockages can be checked by measuring the refriger­ant/pipe temperature. Sudden drop in temperature could indicate a blockage (remark: this is not valid for the expansion valve)).
Check connections and wiring of the com­pressor.
Check expansion valve (liquid back issue).
Check the refrigerant charge. Refer to the nameplate for correct charge.
lar intervals.
Check if the correct spare part is installed.
Check if the outdoor main PCB receives power.
Check if the HAP LED is blinking in regu­lar intervals.
Check if the correct spare part is installed.
In case of suspicion of non condensables, recover, vacuum and recharge with virgin refrigerant.
Replace the blocked part.
Replace compressor when required.
Investigate reason of breakdown.
Replace expansion valve when required.
Fix possible leak.
Restore the power to the outdoor main PCB.
Replace outdoor main PCB when HAP LED is not blinking in regular intervals.
Restore the power to the outdoor inverter PCB.
Replace the outdoor inverter PCB when required.
when required.
motor when required.
2.2.2.5. “E7-00” – Fan motor abnormality
Trigge r Effect Reset
Fan does not start in about 15~30 sec­onds = fan motor lock.
It can occur that E7-00 error is triggered even when the fan motor is running caused by a faulty hall signal.
Possible cause Check Corrective action
Faulty outdoor fan motor. Check the fan motor.
Faulty outdoor inverter PCB. Check outdoor inverter PCB.
Blown fuse. Check the fuse on the outdoor unit PCB's. Replace fuse when required.
Unit will not stop operating. Automatic reset after a continuous run.
Unit will stop operating. Manual reset via user interface.
Replace fan motor when required.
Check fan motor connections and wiring.
Check if the HAP LED is blinking in regu­lar intervals.
Check if the correct spare part is installed.
Adjust wiring when required.
Restore the power to the outdoor inverter PCB.
Replace the outdoor inverter PCB when required.
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RA R32 Split & multi split M-Series
ESIE16-02B | Part 2. Troubleshooting 2.2. Error based troubleshooting
2.2.2.6. “E8-00” – Compressor overcurrent detection
Trigge r Effect Reset
When the compressor is running the cur­rent exceeds 9.25 A ~ 20 A (depending on the unit) for 2.5 seconds.
Possible cause Check Corrective action
Outdoor temperature is out of operation range.
Faulty compressor. Check compressor.
Faulty power module.
= Faulty inverter PCB.
Faulty or disturbance of the power supply (imbalance > 10%). Power drop. Short cir­cuit.
Unit will stop operating. Manual reset via user interface.
Check the outdoor temperature. Wait until the temperature is within opera-
Check connections and wiring of the com­pressor.
Check expansion valve (liquid back issue).
Check the refrigerant charge. Refer to the nameplate for correct charge.
Check outdoor inverter PCB.
Check if the HAP LED is blinking in regu­lar intervals.
Check if the correct spare part is installed.
Check if the power supply is conform with regulations. No fluctuations in frequency.
tion range.
Replace compressor when required.
Investigate reason of breakdown.
Replace expansion valve when required.
Fix possible leak.
Restore the power to the outdoor inverter PCB.
Replace the outdoor inverter PCB when required.
Adjust power supply when required. Power reset via outdoor unit.
2.2.2.7. “EA-00” – 4-way valve abnormality
Trigge r Effect Reset
The room thermistor / indoor heat exchanger are not functioning within oper­ation range.
Possible cause Check Corrective action
Faulty 4-way valve coil. Check 4-way valve coil. Replace 4-way valve coil when required.
Faulty 4-way valve body, blocked. Check 4-way valve body. Replace 4-way valve body when required.
Faulty outdoor unit main PCB. Check if the HAP LED is blinking in regu-
Faulty room thermistor. Check room thermistor. Replace room thermistor when required.
Faulty indoor heat exchanger thermistor. Check indoor heat exchanger thermistor. Replace indoor heat exchanger thermistor
Refrigerant shortage. Check for refrigerant shortage. Refer to
Humidity in refrigerant (ice formation in expansion valve).
Non condensables in refrigerant. Check for non condensables in refriger-
Stop valve is closed. Check stop valve. Open stop valve when required.
Faulty stop valve. Check the stop valve. Replace the stop valve when required.
Unit will not stop operating. Automatic reset when unit runs without
Unit will stop operating. Manual reset via user interface.
lar intervals.
Check if the correct spare part is installed.
Check if the outdoor main PCB receives power.
the nameplate for the correct charge.
Check for humidity in the refrigerant. In case of suspicion of humidity, recover,
ant.
error for 60 minutes.
Restore the power to the outdoor main PCB.
Replace outdoor main PCB when HAP LED is not blinking in regular intervals.
when required.
Charge the correct refrigerant amount when required.
vacuum and recharge with virgin refriger­ant.
In case of suspicion of non condensables, recover, vacuum and recharge with virgin refrigerant.
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RA R32 Split & multi split M-Series
ESIE16-02B | Part 2. Troubleshooting 2.2. Error based troubleshooting
2.2.2.8. “F3-00” – Discharge pipe temperature abnormality
Trigge r Effect Reset
Discharge temperature is too high:
• If the discharge temperature detected is above A°C, 10 times within 200 min.
• If within 200 min the discharge temperature detected is 10 times above B°C for 15 min.
Possible cause Check Corrective action
Refrigerant shortage. Check for refrigerant shortage. Refer to
Humidity in refrigerant (ice formation in expansion valve).
Non condensables in refrigerant. Check for non condensables in refriger-
Stop valve is closed. Check if stop valve is open. Open stop valve when required.
Faulty 4-way valve. Check the 4-way valve. Replace the 4-way valve coil or body
Faulty expansion valve. Check the expansion valve. Replace the expansion valve body or
Faulty outdoor unit main PCB. Check if the HAP LED is blinking in regu-
Faulty discharge thermistor. Check discharge thermistor. Replace discharge thermistor when
Faulty heat exchanger thermistor. Check heat exchanger thermistor. Replace heat exchanger thermistor when
Faulty outdoor temperature thermistor. Check outdoor temperature thermistor. Replace outdoor temperature thermistor
Unit will not stop operating. Automatic reset when temperature drops
Unit will stop operating. Manual reset via remote controller.
the nameplate for the correct charge.
Check for humidity in the refrigerant. In case of suspicion of humidity, recover,
ant.
lar intervals.
Check if the correct spare part is installed.
Check if the outdoor main PCB receives power.
below C°C.
Charge the correct refrigerant amount when required.
vacuum and recharge with virgin refriger­ant.
In case of suspicion of non condensables, recover, vacuum and recharge with virgin refrigerant.
when required.
motor when required.
Restore the power to the outdoor main PCB.
Replace outdoor main PCB when HAP LED is not blinking in regular intervals.
required.
required.
when required.
2.2.2.9. “F6-00” – High pressure abnormality or refrigerant overcharge
Trigge r Effect Reset
Outdoor heat exchanger thermistor meas­ures temperature > 60°C~65°C (depend­ing on model).
Possible cause Check Corrective action
Installation space is too small. Check if the installation space is in line
Dirty outdoor heat exchanger. Clean the outdoor heat exchanger.
Faulty outdoor fan motor. Check the fan motor.
Faulty stop valve. Check the stop valve. Replace the stop valve when required.
Faulty heat exchanger thermistor. Check heat exchanger thermistor. Replace heat exchanger thermistor when
Faulty expansion valve. Check the expansion valve. Replace the expansion valve body or
4/04/17 | Version 1.1 Page 29
Unit will not stop operating. Automatic reset when temperature drops
with regulations.
Check fan motor connections and wiring.
below 50°C.
Adjust installation space.
Replace fan motor when required.
Adjust wiring when required.
required.
motor when required.
RA R32 Split & multi split M-Series
ESIE16-02B | Part 2. Troubleshooting 2.2. Error based troubleshooting
Possible cause Check Corrective action
Faulty outdoor unit main PCB. Check if the HAP LED is blinking in regu-
lar intervals.
Check if the correct spare part is installed.
Check if the outdoor main PCB receives power.
Restore the power to the outdoor main PCB.
Replace outdoor main PCB when HAP LED is not blinking in regular intervals.
2.2.2.10. “H0-00” – Compressor sensor system abnormality
Trigge r Effect Reset
DC voltage before compressor start-up is out of range (0.5~4.5 V).
DC voltage before compressor start-up is below 50 V.
Possible cause Check Corrective action
Faulty outdoor unit main PCB. Check if the HAP LED is blinking in regu-
Faulty outdoor inverter PCB. Check outdoor inverter PCB.
Faulty connection or wiring of the PCB's. Check the connections and the wiring of
Faulty or disturbance of the power supply (imbalance > 10%). Power drop. Short cir­cuit.
Unit will stop operating. Manual reset via user interface.
Unit will stop operating. Manual reset via user interface.
lar intervals.
Check if the correct spare part is installed.
Check if the outdoor main PCB receives power.
Check if the HAP LED is blinking in regu­lar intervals.
Check if the correct spare part is installed.
the PCB’s.
Check if the power supply is conform with regulations. No fluctuations in frequency.
Restore the power to the outdoor main PCB.
Replace outdoor main PCB when HAP LED is not blinking in regular intervals.
Restore the power to the outdoor inverter PCB.
Replace the outdoor inverter PCB when required.
Adjust connection or wiring when required.
Adjust power supply when required. Power reset via outdoor unit.
2.2.2.11. “H6-00” – Position detection sensor abnormality
Trigge r Effect Reset
Compressor fails to start within 15 sec­onds after the compressor run command signal is sent.
Possible cause Check Corrective action
Faulty compressor. Check compressor.
Faulty outdoor unit main PCB. Check if the HAP LED is blinking in regu-
Unit will not stop operating. Automatic reset after a continuous run of
Unit will stop operating if the warning occurs 8 times.
Check connections and wiring of the com­pressor.
Check expansion valve (liquid back issue).
Check the refrigerant charge. Refer to the nameplate for correct charge.
lar intervals.
Check if the correct spare part is installed.
Check if the outdoor main PCB receives power.
10 minutes.
Manual reset via remote controller.
Replace compressor when required.
Investigate reason of breakdown.
Replace expansion valve when required.
Fix possible leak.
Restore the power to the outdoor main PCB.
Replace outdoor main PCB when HAP LED is not blinking in regular intervals.
Page 30 4/04/17 | Version 1.1
RA R32 Split & multi split M-Series
ESIE16-02B | Part 2. Troubleshooting 2.2. Error based troubleshooting
Possible cause Check Corrective action
Faulty outdoor inverter PCB. Check outdoor inverter PCB.
Check if the HAP LED is blinking in regu­lar intervals.
Check if the correct spare part is installed.
Stop valve is closed. Check stop valve. Open stop valve when required.
Faulty or disturbance of the power supply (imbalance > 10%). Power drop. Short cir­cuit.
Check if the power supply is conform with regulations. No fluctuations in frequency.
Restore the power to the outdoor inverter PCB.
Replace the outdoor inverter PCB when required.
Adjust power supply when required. Power reset via outdoor unit.
2.2.2.12. “H8-00” – Compressor input (CT) system abnormality
Trigge r Effect Reset
DC voltage or DC current sensor abnor­mality based on the compressor running frequency and the input current.
Possible cause Check Corrective action
Faulty outdoor unit main PCB. Check if the HAP LED is blinking in regu-
Faulty power module.
Input current or compressor current too low.
Faulty outdoor inverter PCB.
Faulty compressor. Check compressor.
Faulty reactor. Check reactor. Replace reactor when required.
Unit will not stop operating. Automatic reset when compressor runs
Unit will stop operating if the warning occurs several times.
lar intervals.
Check if the correct spare part is installed.
Check if the outdoor main PCB receives power.
Check outdoor inverter PCB.
Check if the HAP LED is blinking in regu­lar intervals.
Check if the correct spare part is installed.
Check connections and wiring of the com­pressor.
Check expansion valve (liquid back issue).
Check the refrigerant charge. Refer to the nameplate for correct charge.
normally for 60 minutes.
Manual reset via user interface.
Restore the power to the outdoor main PCB.
Replace outdoor main PCB when HAP LED is not blinking in regular intervals.
Restore the power to the outdoor inverter PCB.
Replace the outdoor inverter PCB when required.
Replace compressor when required.
Investigate reason of breakdown.
Replace expansion valve when required.
Fix possible leak.
2.2.2.13. “H9-00” – Outdoor air temperature thermistor abnormality
Trigge r Effect Reset
Thermistor input voltage is > 4.96 V or < 0.04 V when power is on.
Possible cause Check Corrective action
Faulty outdoor air temperature thermistor. Check outdoor temperature thermistor. Replace outdoor temperature thermistor
Faulty outdoor unit main PCB. Check if the HAP LED is blinking in regu-
4/04/17 | Version 1.1 Page 31
Unit will stop operating. Manual reset via user interface.
when required.
lar intervals.
Check if the correct spare part is installed.
Check if the outdoor main PCB receives power.
Restore the power to the outdoor main PCB.
Replace outdoor main PCB when HAP LED is not blinking in regular intervals.
RA R32 Split & multi split M-Series
ESIE16-02B | Part 2. Troubleshooting 2.2. Error based troubleshooting
2.2.2.14. “J3-00” – Discharge pipe thermistor abnormality
Trigge r Effect Reset
Thermistor input voltage is > 4.96 V or < 0.04 V when power is on.
Discharge pipe temperature is lower than the heat exchanger temperature.
Unit will stop operating. Manual reset via user interface.
Possible cause Check Corrective action
Faulty discharge pipe thermistor. Check discharge pipe thermistor. Replace discharge pipe thermistor when
Faulty outdoor unit main PCB. Check if the HAP LED is blinking in regu-
lar intervals.
Check if the correct spare part is installed.
Check if the outdoor main PCB receives power.
required.
Restore the power to the outdoor main PCB.
Replace outdoor main PCB when HAP LED is not blinking in regular intervals.
2.2.2.15. “J5-00” – Suction pipe thermistor abnormality
Trigge r Effect Reset
Suction pipe thermistor detects an abnor­mal value (open or short circuit).
Unit will stop operating. Automatic reset.
Possible cause Check Corrective action
Faulty outdoor unit main PCB. Check if the HAP LED is blinking in regu-
lar intervals.
Check if the correct spare part is installed.
Check if the outdoor main PCB receives power.
Faulty suction pipe thermistor. Check suction pipe thermistor. Replace suction pipe thermistor when
Faulty capacity adapter on outdoor PCB. Check if the correct adapter is installed.
Check if the correct spare part is installed.
Adjust the power to the outdoor main PCB.
Replace outdoor main PCB when HAP LED is not blinking in regular intervals.
required.
Adjust capacity adapter when required.
2.2.2.16. “J6-00” – Outdoor heat exchanger thermistor abnormality
Trigge r Effect Reset
Thermistor input voltage is > 4.96 V or < 0.04 V when power is on.
Unit will stop operating. Manual reset via user interface.
Possible cause Check Corrective action
Faulty heat exchanger thermistor. Check heat exchanger thermistor. Replace heat exchanger thermistor when
Faulty outdoor unit main PCB. Check if the HAP LED is blinking in regu-
Page 32 4/04/17 | Version 1.1
lar intervals.
Check if the correct spare part is installed.
Check if the outdoor main PCB receives power.
required.
Restore the power to the outdoor main PCB.
Replace outdoor main PCB when HAP LED is not blinking in regular intervals.
RA R32 Split & multi split M-Series
ESIE16-02B | Part 2. Troubleshooting 2.2. Error based troubleshooting
More info:
Check procedures Replacing procedures
"Refrigerant thermistors" on page 56 "Replacing thermistors" on page 87
"Main PCB" on page 53 "Replacing main PCB" on page 84
2.2.2.17. “J8-00” – Liquid pipe thermistor abnormality
Trigge r Effect Reset
Liquid pipe thermistor detects an abnor­mal value (open or short circuit).
Possible cause Check Corrective action
Faulty outdoor unit main PCB. Check if the HAP LED is blinking in regu-
Faulty liquid pipe thermistor. Check liquid pipe thermistor. Replace liquid pipe thermistor when
Faulty capacity adapter on outdoor PCB. Check if the correct adapter is installed.
Unit will stop operating. Automatic reset.
lar intervals.
Check if the correct spare part is installed.
Check if the outdoor main PCB receives power.
Check if the correct spare part is installed.
Adjust the power to the outdoor main PCB.
Replace outdoor main PCB when HAP LED is not blinking in regular intervals.
required.
Adjust capacity adapter when required.
More info:
Check procedures Replacing procedures
"Main PCB" on page 53 "Replacing main PCB" on page 84
"Refrigerant thermistors" on page 56 "Replacing thermistors" on page 87
2.2.2.18. “J9-00” – Gas pipe thermistor abnormality
Trigge r Effect Reset
Thermistor input voltage is > 4.96 V or < 0.04 V when power is on.
Discharge pipe temperature is lower than the heat exchanger temperature.
Possible cause Check Corrective action
Faulty discharge pipe thermistor. Check discharge pipe thermistor. Replace discharge pipe thermistor when
Faulty outdoor unit main PCB. Check if the HAP LED is blinking in regu-
Unit will stop operating. Manual reset via user interface.
required.
lar intervals.
Check if the correct spare part is installed.
Check if the outdoor main PCB receives power.
Restore the power to the outdoor main PCB.
Replace outdoor main PCB when HAP LED is not blinking in regular intervals.
More info:
Check procedures Replacing procedures
"Refrigerant thermistors" on page 56 "Replacing thermistors" on page 87
"Main PCB" on page 53 "Replacing main PCB" on page 84
4/04/17 | Version 1.1 Page 33
RA R32 Split & multi split M-Series
ESIE16-02B | Part 2. Troubleshooting 2.2. Error based troubleshooting
2.2.2.19. “L1-00” – Outdoor main PCB abnormality
Trigge r Effect Reset
Outdoor main PCB detects current/volt­age errors.
Possible cause Check Corrective action
Blown fuse. Check fuse on outdoor main PCB. Replace fuse if blown.
Faulty outdoor unit main PCB. Check if the HAP LED is blinking in regu-
Faulty outdoor inverter PCB. Check outdoor inverter PCB.
Faulty compressor. Check compressor.
Faulty or disturbance of the power supply (imbalance > 10%). Power drop. Short cir­cuit.
Faulty outdoor fan motor. Check the fan motor.
Faulty capacity adapter on outdoor PCB. Check if the correct adapter is installed.
External factory (e.g. electrical noise). (cause when error is reset after power reset, and error happens again after a while).
Unit will stop operating. Manual reset via user interface.
Power reset via outdoor unit.
lar intervals.
Check if the correct spare part is installed.
Check if the outdoor main PCB receives power.
Check if the alive led is blinking in regular intervals.
Check if the correct spare part is installed.
Check connections and wiring of the com­pressor.
Check expansion valve (liquid back issue).
Check the refrigerant charge. Refer to the nameplate for correct charge.
Check if the power supply is conform with regulations. No fluctuations in frequency.
Check fan motor connections and wiring.
Check if the correct spare part is installed.
Check for source which could cause elec­trical interference.
Adjust the power to the outdoor main PCB.
Replace outdoor main PCB when HAP LED is not blinking in regular intervals.
Adjust the power to the outdoor inverter PCB.
Replace outdoor inverter PCB.
Replace compressor when required.
Investigate reason of breakdown.
Replace expansion valve when required.
Fix possible leak.
Adjust power supply when required. Power reset via outdoor unit.
Replace fan motor when required.
Adjust wiring when required.
Adjust capacity adapter when required.
Avoid electrical interference.
More info:
Check procedures Replacing procedures
"Main PCB" on page 53 "Replacing main PCB" on page 84
"Compressor" on page 47 "Replacing compressor" on page 76
"Electronic expansion valve" on page 49 "Replacing expansion valve body" on page 81
"Fan motor" on page 51 "Replacing DC fan motor assembly" on page 79
2.2.2.20. “L3-00” – Switch box temperature abnormality
Trigge r Effect Reset
Switch box temperature is too high when the compressor is off.
Page 34 4/04/17 | Version 1.1
Unit will not stop operating. Automatic reset when temperature drops.
Unit will stop operating. Manual reset via remote controller.
RA R32 Split & multi split M-Series
ESIE16-02B | Part 2. Troubleshooting 2.2. Error based troubleshooting
Possible cause Check Corrective action
Faulty outdoor inverter PCB. Check outdoor inverter PCB.
Faulty radiation fin thermistor.
Faulty outdoor fan motor. Check the fan motor.
Faulty or disturbance of the power supply (imbalance > 10%). Power drop. Short cir­cuit.
Outdoor heat exchanger is dirty. Check outdoor heat exchanger. Clean outdoor heat exchanger when
Check if the HAP LED is blinking in regu­lar intervals.
Check if the correct spare part is installed.
Check fan motor connections and wiring.
Check if the power supply is conform with regulations. No fluctuations in frequency.
Restore the power to the outdoor inverter PCB.
Replace the outdoor inverter PCB when required.
Replace fan motor when required.
Adjust wiring when required.
Adjust power supply when required. Power reset via outdoor unit.
required.
More info:
INFORMATION
The Inverter PCB and Main PCB are 1 PCB in this unit.
Check procedures Replacing procedures
"Main PCB" on page 53 "Replacing main PCB" on page 84
"Fan motor" on page 51 "Replacing DC fan motor assembly" on page 79
"“L3-00” – Switch box temperature abnormality" on page 111
2.2.2.21. “L4-00” – Inverter radiating fin temperature abnormality
Trigge r Effect Reset
Radiation fin temperature rise is detected. Unit will stop operating. Automatic reset.
Power reset via outdoor unit.
Possible cause Check Corrective action
Faulty outdoor fan motor. Check the fan motor.
Check fan motor connections and wiring.
Faulty or disturbance of the power supply (imbalance > 10%). Power drop. Short cir­cuit.
Faulty radiating fin thermistor. Check radiating fin thermistor. Replace radiating fin thermistor when
Faulty outdoor unit PCB in which radiating fin thermistor is connected.
Silicon grease is not applied properly on the radiation fin.
Check if the power supply is conform with regulations. No fluctuations in frequency.
Check if the HAP LED is blinking in regu­lar intervals.
Check if the correct spare part is installed.
Check if the outdoor main PCB receives power.
Check the silicon grease on the outdoor unit PCB.
Replace fan motor when required.
Adjust wiring when required.
Adjust power supply when required. Power reset via outdoor unit.
required.
Restore the power to the outdoor main PCB.
Replace outdoor main PCB when HAP LED is not blinking in regular intervals.
Adjust silicon grease when required.
More info:
Check procedures Replacing procedures
"Fan motor" on page 51 "Replacing DC fan motor assembly" on page 79
"Refrigerant thermistors" on page 56 "Replacing thermistors" on page 87
"Main PCB" on page 53 "Replacing main PCB" on page 84
"“L4-00” – Inverter radiating fin temperature abnormality" on page 111
4/04/17 | Version 1.1 Page 35
RA R32 Split & multi split M-Series
ESIE16-02B | Part 2. Troubleshooting 2.2. Error based troubleshooting
2.2.2.22. “L5-00” – Inverter instantaneous overcurrent (AC output)
Trigge r Effect Reset
An output overcurrent is detected by checking the current that flows in the inverter DC section.
Possible cause Check Corrective action
Installation of the unit is not in line with specifications.
Refrigerant shortage. Check for refrigerant shortage. Refer to
Humidity in refrigerant (ice formation in expansion valve).
Non condensables in refrigerant. Check for non condensables in refriger-
Stop valve is closed. Check stop valve. Open stop valve when required.
Faulty power module = faulty outdoor inverter PCB.
Faulty compressor. Check compressor.
Faulty or disturbance of the power supply (imbalance > 10%). Power drop. Short cir­cuit.
Unit will stop operating. Manual reset via user interface.
Check the installation specifications. Refer to the installation manual.
the nameplate for the correct charge.
Check for humidity in the refrigerant. In case of suspicion of humidity, recover,
ant.
Check outdoor inverter PCB.
Check if the HAP LED is blinking in regu­lar intervals.
Check if the correct spare part is installed.
Check connections and wiring of the com­pressor.
Check expansion valve (liquid back issue).
Check the refrigerant charge. Refer to the nameplate for correct charge.
Check if the power supply is conform with regulations. No fluctuations in frequency.
Adjust the installation when required.
Charge the correct refrigerant amount when required.
vacuum and recharge with virgin refriger­ant.
In case of suspicion of non condensables, recover, vacuum and recharge with virgin refrigerant.
Restore the power to the outdoor inverter PCB.
Replace the outdoor inverter PCB when required.
Replace compressor when required.
Investigate reason of breakdown.
Replace expansion valve when required.
Fix possible leak.
Adjust power supply when required. Power reset via outdoor unit.
More info:
INFORMATION
The Inverter PCB and Main PCB are 1 PCB in this unit.
Check procedures Replacing procedures
"Main PCB" on page 53 "Replacing main PCB" on page 84
"Compressor" on page 47 "Replacing compressor" on page 76
"Electronic expansion valve" on page 49 "Replacing expansion valve body" on page 81
2.2.2.23. “P4-00” – Radiating fin temperature sensor abnormality
Trigge r Effect Reset
Radiating fin thermistor input voltage is < 0.04 V or > 4.96 V when power is on.
Possible cause Check Corrective action
Faulty radiating fin thermistor. Check radiating fin thermistor. Replace radiating fin thermistor when
Unit will stop operating. Manual reset via user interface.
required.
Page 36 4/04/17 | Version 1.1
RA R32 Split & multi split M-Series
ESIE16-02B | Part 2. Troubleshooting 2.2. Error based troubleshooting
Possible cause Check Corrective action
Faulty outdoor unit PCB in which radiating fin thermistor is connected.
Check if the HAP LED is blinking in regu­lar intervals.
Check if the correct spare part is installed.
Check if the outdoor main PCB receives power.
Restore the power to the outdoor main PCB.
Replace outdoor main PCB when HAP LED is not blinking in regular intervals.
More info:
Check procedures Replacing procedures
"Refrigerant thermistors" on page 56 "Replacing thermistors" on page 87
"Main PCB" on page 53 "Replacing main PCB" on page 84
4/04/17 | Version 1.1 Page 37
RA R32 Split & multi split M-Series
ESIE16-02B | Part 2. Troubleshooting 2.2. Error based troubleshooting
2.2.3. System
2.2.3.1. “U0-00” – Refrigerant shortage
Trigge r Effect Reset
Refrigerant shortage detected. Unit will stop operating. Automatic reset.
Power reset via outdoor unit.
Possible cause Check Corrective action
Faulty air thermistor. Check air thermistor. Replace air thermistor when required.
Faulty discharge thermistor. Check discharge thermistor. Replace discharge thermistor when
Faulty outdoor heat exchanger thermistor. Check outdoor heat exchanger thermistor. Replace outdoor heat exchanger thermis-
Stop valve is closed. Check stop valve. Open stop valve when required.
Refrigerant shortage. Check for refrigerant shortage. Refer to
Humidity in refrigerant (ice formation in expansion valve).
Non condensables in refrigerant. Check for non condensables in refriger-
Faulty compressor. Check compressor.
Faulty expansion valve. Check the expansion valve. Replace the expansion valve body or
the nameplate for the correct charge.
Check for humidity in the refrigerant. In case of suspicion of humidity, recover,
ant.
Check connections and wiring of the com­pressor.
Check expansion valve (liquid back issue).
Check the refrigerant charge. Refer to the nameplate for the correct charge.
required.
tor when required.
Charge the correct refrigerant amount when required.
vacuum and recharge with virgin refriger­ant.
In case of suspicion of non condensables, recover, vacuum and recharge with virgin refrigerant.
Replace compressor when required.
Investigate reason of breakdown.
Replace expansion valve when required.
Fix possible leak.
motor when required.
More info:
Check procedures Replacing procedures
"Refrigerant thermistors" on page 56
"Compressor" on page 47 "Replacing compressor" on page 76
"Electronic expansion valve" on page 49 "Replacing expansion valve body" on page 81
"Error codes" on page 111
2.2.3.2. “U2-00” – Power supply abnormality or instantaneous power failure
Trigge r Effect Reset
There is no zero-cross detected in approximately 10 seconds (indoor unit PCB).
Abnormal voltage drop (< 150-180 V) is detected by the DC voltage detection cir­cuit.
Abnormal voltage rise is detected by the over-voltage detection circuit.
Page 38 4/04/17 | Version 1.1
"Replacing expansion valve motor" on page 82
Unit will stop operating. Power reset via outdoor unit.
Unit will stop operating. Automatic restart after compressor
stand-by of 3 minutes.
Unit will stop operating. Automatic restart after compressor
stand-by of 3 minutes.
RA R32 Split & multi split M-Series
ESIE16-02B | Part 2. Troubleshooting 2.2. Error based troubleshooting
Possible cause Check Corrective action
Faulty or disturbance of the power supply (imbalance > 10%). Power drop. Short cir­cuit.
Defective DC voltage detection circuit. Check PCB with DC voltage detection cir-
Defective over-voltage detection circuit. Check PCB with over-voltage detection
Defective PAM control part. Check PAM control part. Replace PAM control part when required.
Faulty compressor. Check compressor.
Faulty outdoor fan motor. Check the fan motor.
Momentary drop of voltage. - Wait until compressor restarts.
Momentary power failure. - Wait until compressor restarts.
Faulty outdoor unit main PCB. Check if the HAP LED is blinking in regu-
Faulty indoor unit main PCB. Check if the HAP LED is blinking in regu-
Check if the power supply is conform with regulations. No fluctuations in frequency.
cuit.
circuit.
Check connections and wiring of the com­pressor.
Check expansion valve (liquid back issue).
Check the refrigerant charge. Refer to the nameplate for correct charge.
Check fan motor connections and wiring.
lar intervals.
Check if the correct spare part is installed.
Check if the outdoor main PCB receives power.
lar intervals.
Check if the correct spare part is installed.
Check if the indoor main PCB receives power.
Adjust power supply when required. Power reset via outdoor unit.
Replace PCB when required.
Replace PCB when required.
Replace compressor when required.
Investigate reason of breakdown.
Replace expansion valve when required.
Fix possible leak.
Replace fan motor when required.
Adjust wiring when required.
Restore the power to the outdoor main PCB.
Replace outdoor main PCB when HAP LED is not blinking in regular intervals.
Restore the power to the indoor main PCB.
Replace indoor main PCB when HAP LED is not blinking in regular intervals.
More info:
Check procedures Replacing procedures
"Compressor" on page 47 "Replacing compressor" on page 76
"Electronic expansion valve" on page 49 "Replacing expansion valve body" on page 81
"Fan motor" on page 51 "Replacing DC fan motor assembly" on page 79
"Main PCB" on page 53 "Replacing main PCB" on page 84
2.2.3.3. “U4-00” – Transmission abnormality between indoor unit and outdoor unit
Trigge r Effect Reset
Data sent from outdoor unit cannot be received normally, content of the send data is abnormal.
Possible cause Check Corrective action
Faulty or disturbance of the power supply (imbalance > 10%). Power drop. Short cir­cuit.
Unit will stop operating. Power reset via outdoor unit.
Check if the power supply is conform with regulations. No fluctuations in frequency.
Adjust power supply when required. Power reset via outdoor unit.
4/04/17 | Version 1.1 Page 39
RA R32 Split & multi split M-Series
ESIE16-02B | Part 2. Troubleshooting 2.2. Error based troubleshooting
Possible cause Check Corrective action
Wiring abnormality between indoor unit and outdoor unit.
Faulty outdoor unit main PCB. Check if the HAP LED is blinking in regu-
Faulty outdoor fan motor. Check the fan motor.
Faulty indoor unit main PCB. Check if the HAP LED is blinking in regu-
Check wiring between indoor unit and out­door unit.
lar intervals.
Check if the correct spare part is installed.
Check if the outdoor main PCB receives power.
Check fan motor connections and wiring.
lar intervals.
Check if the correct spare part is installed.
Check if the indoor main PCB receives power.
Adjust wiring between indoor unit and out­door unit when required.
Replace wiring between indoor unit and outdoor unit when required.
Restore the power to the outdoor main PCB.
Replace outdoor main PCB when HAP LED is not blinking in regular intervals.
Replace fan motor when required.
Adjust wiring when required.
Restore the power to the indoor main PCB.
Replace indoor main PCB when HAP LED is not blinking in regular intervals.
More info:
Check procedures Replacing procedures
"Main PCB" on page 53 "Replacing main PCB" on page 84
"Fan motor" on page 51 "Replacing DC fan motor assembly" on page 79
2.2.3.4. “U7-00” – Transmission outdoor unit-outdoor unit abnormality
Trigge r Effect Reset
Communication abnormality between out­door unit PCB's.
Possible cause Check Corrective action
Faulty wiring between outdoor unit PCBs. Check wiring between outdoor unit PCBs. Adjust wiring between outdoor unit PCBs
Faulty outdoor unit main PCB. Check if the HAP LED is blinking in regu-
Faulty outdoor inverter PCB. Check outdoor inverter PCB.
More info:
Check procedures Replacing procedures
Unit will stop operating. Manual reset via user interface.
when required.
lar intervals.
Check if the correct spare part is installed.
Check if the outdoor main PCB receives power.
Check if the alive led is blinking in regular intervals.
Check if the correct spare part is installed.
"Replacing main PCB" on page 84
Adjust the power to the outdoor main PCB.
Replace outdoor main PCB when HAP LED is not blinking in regular intervals.
Adjust the power to the outdoor inverter PCB.
Replace outdoor inverter PCB.
2.2.3.5. “UA-00” – Improper combination of indoor unit and outdoor unit
Trigge r Effect Reset
Signal transmission between indoor unit and outdoor unit abnormality.
Page 40 4/04/17 | Version 1.1
Unit will stop operating. Power reset via outdoor unit.
RA R32 Split & multi split M-Series
ESIE16-02B | Part 2. Troubleshooting 2.2. Error based troubleshooting
Possible cause Check Corrective action
Improper combination of indoor unit and outdoor unit.
Wiring abnormality between indoor unit and outdoor unit.
Faulty outdoor unit main PCB. Check if the HAP LED is blinking in regu-
Faulty indoor unit main PCB. Check if the HAP LED is blinking in regu-
Check combination. Adjust installation when required.
Check wiring between indoor unit and out­door unit.
lar intervals.
Check if the correct spare part is installed.
Check if the outdoor main PCB receives power.
lar intervals.
Check if the correct spare part is installed.
Check if the indoor main PCB receives power.
Adjust wiring between indoor unit and out­door unit when required.
Replace wiring between indoor unit and outdoor unit when required.
Restore the power to the outdoor main PCB.
Replace outdoor main PCB when HAP LED is not blinking in regular intervals.
Restore the power to the indoor main PCB.
Replace indoor main PCB when HAP LED is not blinking in regular intervals.
More info:
Check procedures Replacing procedures
"Main PCB" on page 53 "Replacing main PCB" on page 84
2.2.3.6. “UF-00” – Wiring and piping mismatch
Trigge r Effect Reset
When the interunit wiring between indoor and outdoor unit is incorrect.
Piping abnormality.
Possible cause Check Corrective action
Faulty wiring between indoor and outdoor unit.
Refrigerant shortage (incorrect charge/leakage).
Refrigerant circuit is clogged. Check for possible blockage (Blockages
Unit will stop operating. Automatic reset.
Check wiring between indoor and outdoor unit.
Check for refrigerant shortage.
Perform a leak test.
can be checked by measuring the refriger­ant/pipe temperature. Sudden drop in temperature could indicate a blockage. (Remark: This is not valid for the expan­sion valve.)).
Correct wiring.
If required, repair the leak and charge the correct amount of refrigerant.
More info:
Check procedures Replacing procedures
"Wiring diagram" on page 98
2.2.4. Others
Not applicable.
4/04/17 | Version 1.1 Page 41
RA R32 Split & multi split M-Series
ESIE16-02B | Part 2. Troubleshooting 2.3. Symptom based troubleshooting
2.3. Symptom based troubleshooting
2.3.1. Indoor unit
Not available yet.
2.3.2. Outdoor unit
Not available yet.
2.3.3. System
Not applicable.
2.3.4. Others
Not applicable.
Page 42 4/04/17 | Version 1.1
RA R32 Split & multi split M-Series
ESIE16-02B | Part 2. Troubleshooting 2.4. Component checklist
2.4. Component checklist
Overview of component checklists:
Indoor unit ............................................................................................................................................................................................44
Fan motor .................................................................................................................................................................................44
Outdoor unit..........................................................................................................................................................................................45
4-way valve ..............................................................................................................................................................................45
Compressor..............................................................................................................................................................................47
Electronic expansion valve.......................................................................................................................................................49
Fan motor .................................................................................................................................................................................51
High pressure sensor ...............................................................................................................................................................52
Main PCB .................................................................................................................................................................................53
Pressure sensor .......................................................................................................................................................................54
Refrigerant thermistors .............................................................................................................................................................56
System .................................................................................................................................................................................................58
Others .................................................................................................................................................................................................58
4/04/17 | Version 1.1 Page 43
RA R32 Split & multi split M-Series
ESIE16-02B | Part 2. Troubleshooting 2.4. Component checklist
2.4.1. Indoor unit
2.4.1.1. Fan motor
Technical specification Description
The motor has a single connector for DC power and the rotation counter feed back from the integrated pulse generator (4 pulses/revolution).
Location
Piping diagram Wiring diagram Switch box Component overview of unit
See "Indoor unit" on
page 104.
Check procedure
Mechanical check
See "Indoor unit" on page 98. Not applicable. Not applicable.
PRELIMINARY ACTIONS
1. Switch off the Daikin unit via the user interface.
The fan motor runs on a fixed speed to supply the required air flow rate.
2. Switch off the Daikin unit with the field supplied circuit breaker.
3. Remove casing when required.
PROCEDURE
1. Check the state of the rotor, replace the rotor if damaged, deformed, cracked or broken.
2. Check the motor shaft bearing friction, only perform electrical check if motor runs with low shaft bearing friction. Replace fan motor if friction is abnormal.
Electrical check
PRELIMINARY ACTIONS
1. Switch off the Daikin unit via the user interface.
2. Switch off the Daikin unit with the field supplied circuit breaker.
3. Remove casing when required.
PROCEDURE
1. Check fuse on indoor PCB, replace if blown.
WARNING: RISK OF FIRE
When reconnecting a connector to the PCB, do not apply force, as this may damage the connector or connector pins of the PCB.
2. Check if fan motor connector is plugged into PCB.
3. Power the Daikin unit.
4. Check power supply, the measured voltage must be 198 - 240 VAC, if not replace indoor PCB.
Page 44 4/04/17 | Version 1.1
RA R32 Split & multi split M-Series
ESIE16-02B | Part 2. Troubleshooting 2.4. Component checklist
2.4.2. Outdoor unit
2.4.2.1. 4-way valve
Technical specification Description
- The 4-way valve directs the super heated refrigerant discharged
Location
Piping diagram Wiring diagram Switch box Component overview of unit
See "Outdoor unit" on
page 104.
Check procedure
Mechanical check
See "Outdoor unit" on
page 99.
PRELIMINARY ACTIONS
1. Switch off the Daikin unit via the user interface.
from the compressor to the indoor heat exchanger in case of heat­ing operation or to the outdoor heat exchanger in case of defrost­ing and cooling operation.
See "Outdoor unit" on
page 111.
See "Outdoor unit" on page 110.
2. Switch off the Daikin unit with the field supplied circuit breaker.
3. Remove plate work when required.
PROCEDURE
1. Loosen the screw and remove the coil from the 4-way valve (refer to "Replacing 4-way valve coil" on page 75).
WARNING: RISK OF FIRE
When reconnecting a connector to the PCB, do not apply force, as this may damage the connector or connector pins of the PCB.
2. Unplug 4-way valve connector from applicable PCB, see table "Component checklist" on page 111.
3. Switch on the Daikin unit via the user interface, start cooling/defrost operation.
If the temperature after the heat exchanger drops, proceed with next step.
If the temperature after the heat exchanger rises, the 4-way valve is stuck in heating position, replace the 4-way valve body (refer to "Replacing 4-way valve body" on page 73).
If the temperature after the heat exchanger does not rise, check the refrigerant pressure by connecting a manifold to one of the service ports.
- If no pressure is measured, perform a pressure test and fix any leaks.
- If pressure is measured, the 4-way valve is stuck in the middle, confirm by determining the position of the 4-way valve as described below and replace the 4-way valve (refer to "Replacing 4-way valve body" on page 73).
CAUTION - RISK OF LIQUID ENTERING THE COMPRESSOR
To prevent damage to the compressor the step below must only be done once.
4. While listening to the 4-way valve, place a round permanent magnet on the core of the solenoid valve. If you do not hear the 4-way valve switching, it must be replaced (refer to "Replacing 4-way valve body" on page 73).
Electrical check
PRELIMINARY ACTIONS
1. Switch off Daikin unit via the user interface.
4/04/17 | Version 1.1 Page 45
RA R32 Split & multi split M-Series
ESIE16-02B | Part 2. Troubleshooting 2.4. Component checklist
2. Switch off Daikin unit with the field supplied circuit breaker.
3. Remove plate work when required.
PROCEDURE
1. Switch on the Daikin unit, start heating operation.
WARNING: RISK OF FIRE
When reconnecting a connector to the PCB, do not apply force, as this may damage the connector or connector pins of the PCB.
2. Measure the voltage on 4-way valve connector: pin 1-3, see table "Component checklist" on page 111. If the measured voltage does not range 220-240 VAC during switching / 15 VAC after switching, unplug 4-way valve connector from PCB and measure the voltage directly on the PCB: pin 1-3 of 4-way valve connection.
- If the voltage, measured directly on the PCB does not range 220-240 VAC during switching / 15 VAC after switching,
replace main PCB.
- If the voltage, measured directly on the PCB does range 220-240 VAC during switching / 15 VAC after switching, replace
the 4-way valve coil (refer to "Replacing 4-way valve coil" on page 75).
WARNING: RISK OF FIRE
When reconnecting a connector to the PCB, do not apply force, as this may damage the connector or connector pins of the PCB.
3. Unplug 4-way valve connector from PCB and measure the resistance of the 4-way valve coil. If the measured resistance does not range 1000 - 2000 Ω, replace the 4-way valve coil (refer to "Replacing 4-way valve coil" on page 75).
4. Switch on the Daikin unit, start cooling/defrost operation.
If the temperature after the plate type heat exchanger rises, the control of the 4-way valve is wrong. Replace main PCB.
Determine the position of the 4-way valve
1. Switch off Daikin unit via the user interface.
2. Switch off Daikin unit with the field supplied circuit breaker.
3. Slide a magnet over the front and the rear of the 4-way valve body and sense the attraction of the magnet to determine the valve position.
4. If the magnet is attracted in positions A,A’ or B,B’, the 4-way valve is OK; if the magnet is attracted in positions C,C’ the 4-way valve must be replaced (refer to "Replacing 4-way valve body" on page 73).
A
A’ B B’ C C’
Page 46 4/04/17 | Version 1.1
RA R32 Split & multi split M-Series
ESIE16-02B | Part 2. Troubleshooting 2.4. Component checklist
2.4.2.2. Compressor
Technical specification Description
Type: inverter driven, swing double swing. The compressor compresses the refrigerant in the refrigerant cir-
Location
Piping diagram Wiring diagram Switch box Component overview of unit
See "Outdoor unit" on
page 104.
See "Outdoor unit" on
page 99.
Check procedure
Preliminary check
1. Check if the Daikin unit is connected to earth.
2. Check if the stop valve is open.
Mechanical check
PRELIMINARY ACTIONS
cuit.
See "Outdoor unit" on
page 111.
See "Outdoor unit" on page 110.
1. Switch off the Daikin unit via the user interface.
2. Switch off the Daikin unit with the field supplied circuit breaker.
3. Remove plate work when required (refer to "Basic removal" on page 68).
PROCEDURE
1. Open the compressor insulation.
2. Check if the condition of the compressor dampers and piping is correct.
Electrical check
PRELIMINARY ACTIONS
1. Switch off the Daikin unit via the user interface.
2. Switch off the Daikin unit with the field supplied circuit breaker.
3. Remove plate work when required.
PROCEDURE
1. Open the compressor insulation.
2. Switch on the Daikin unit and measure the U, V, W inverter voltages. All voltages must be identical, if not, replace the inverter
PCB.
3. Switch off the Daikin unit via the user interface.
4. Switch off the Daikin unit with the field supplied circuit breaker.
INFORMATION
Note the position of the cables on the compressor wire terminals to allow identical wiring during reinstallation.
5. Disconnect the Faston connectors U, V and W from the compressor, take picture.
6. Measure the compressor motor windings U-V, V-W and U-W.
4/04/17 | Version 1.1 Page 47
RA R32 Split & multi split M-Series
ESIE16-02B | Part 2. Troubleshooting 2.4. Component checklist
7. Megger the compressor using 500 or 1000 VDC, the insulation must be higher than 3 MΩ.
8. Replace the compressor if the windings and/or insulation measurements fail (refer to "Replacing compressor" on page 76).
9. Run the compressor and measure the current in each phase; the current for each phase should be identical (refer to "Product
specific information" on page 111). In that case it can be decided to preventively replace the compressor (refer to "Replacing compressor" on page 76).
Page 48 4/04/17 | Version 1.1
RA R32 Split & multi split M-Series
ESIE16-02B | Part 2. Troubleshooting 2.4. Component checklist
2.4.2.3. Electronic expansion valve
Technical specification Description
The electronic expansion valve has a hermetically sealed body with a slide-on stepping motor drive coil (480 pulses from fully closed to fully open position).
Location
Piping diagram Wiring diagram Switch box Component overview of unit
See "Outdoor unit" on
page 104.
See "Outdoor unit" on
page 99.
Check procedure
Mechanical check
PRELIMINARY ACTIONS
1. Switch off the Daikin unit via the user interface.
The electronic expansion valve is used:
• To control the flow of refrigerant. Depending on location, the trigger point is sub-cool or superheat.
• To stop the flow of refrigerant completely when closing (= 0 pulses).
See "Outdoor unit" on
page 111.
See "Outdoor unit" on page 110.
2. Switch off the Daikin unit with the field supplied circuit breaker.
3. Switch on the Daikin unit and listen to the expansion valve assembly, if the expansion valve body does not create a latching sound, continue with the electrical check.
4. Switch off the Daikin unit via the user interface.
5. Switch off the Daikin unit with the field supplied circuit breaker.
6. Remove plate work when required (refer to "Basic removal" on page 68).
PROCEDURE
1. Remove the expansion valve coil from the expansion valve body.
2. Slide the magnet (tool part N° 9950038) over the expansion valve body and gently rotate the magnet to manually operate the expansion valve body clockwise (closing) and counterclockwise (opening).
3. If it is not possible to open the expansion valve body with the magnet, the expansion valve body is blocked and the expansion valve body must be replaced (refer to "Replacing expansion valve body" on page 81).
Electrical check
PRELIMINARY ACTIONS
1. Switch off the Daikin unit via the user interface.
2. Switch off the Daikin unit with the field supplied circuit breaker.
3. Remove plate work when required (refer to "Basic removal" on page 68).
PROCEDURE
1. Check if the electrical connector of the expansion valve coil was correctly connected to the PCB, if not, connect the electrical connector.
2. Disconnect the electrical connector of the expansion valve coil and check the continuity between below pins using a multi meter. It should be ± the same value.
- Connector pin 1-6: connected
4/04/17 | Version 1.1 Page 49
RA R32 Split & multi split M-Series
ESIE16-02B | Part 2. Troubleshooting 2.4. Component checklist
- Connector pin 2-6: connected
- Connector pin 3-6: connected
- Connector pin 4-6: connected
Harness 5P
1
6
3
6P Connector
3. If one or more of the windings have no continuity, replace the expansion valve coil.
Check
2
4
Page 50 4/04/17 | Version 1.1
RA R32 Split & multi split M-Series
ESIE16-02B | Part 2. Troubleshooting 2.4. Component checklist
2.4.2.4. Fan motor
Technical specification Description
The motor has a single connector for DC power and the rotation counter feed back from the integrated pulse generator (4 pulses/revolution).
Location
Piping diagram Wiring diagram Switch box Component overview of unit
See "Outdoor unit" on
page 104.
See "Outdoor unit" on
page 99.
Check procedure
Mechanical check
PRELIMINARY ACTIONS
1. Switch off the Daikin unit via the user interface.
2. Switch off the Daikin unit with the field supplied circuit breaker.
3. Remove plate work when required (refer to "Basic removal" on page 68).
The fan motor runs on a fixed speed to supply the required air flow rate.
See "Outdoor unit" on
page 111.
See "Outdoor unit" on page 110.
PROCEDURE
1. Check the state of the propeller, replace the propeller if damaged, deformed, cracked or broken (refer to "Replacing propeller
fan blade assembly" on page 85).
2. Check the motor shaft bearing friction, only perform electrical check if motor runs with low shaft bearing friction. Replace fan motor if friction is abnormal (refer to "Replacing DC fan motor assembly" on page 79).
Electrical check
PRELIMINARY ACTIONS
1. Switch off the Daikin unit via the user interface.
2. Switch off the Daikin unit with the field supplied circuit breaker.
3. Remove plate work when required (refer to "Basic removal" on page 68).
PROCEDURE
1. Check fuse on PCB, replace if blown, see table "Component checklist" on page 111.
WARNING: RISK OF FIRE
When reconnecting a connector to the PCB, do not apply force, as this may damage the connector or connector pins of the PCB.
2. Check if fan motor connector is plugged into PCB.
3. Power the Daikin unit.
4. Check power supply, the measured voltage must be 198 - 240 VAC, if not replace main PCB (refer to
on page 84
).
4/04/17 | Version 1.1 Page 51
"Replacing main PCB"
RA R32 Split & multi split M-Series
-5.1
-0.5 0 0.5 1 1.5 2 2.5 3 3.5 4
0
5.1
10.2
15.3
20.4
25.5
30.6
35.7
40.8
45.9
51.0
Detected Pressure
P
H
(kg/cm2)
P
H
= 1.38VH-0.69
V
H
: Output Voltage (High Side) V
DC
Output Voltage (VH, VL)
High Pressure (PH)
ESIE16-02B | Part 2. Troubleshooting 2.4. Component checklist
2.4.2.5. High pressure sensor
Technical specification Description
The pressure sensor is an analog pressure sensor. The pressure sensor measures the pressure in the high pressure
Location
Piping diagram Wiring diagram Switch box Component overview of unit
See "Outdoor unit" on
page 104.
See "Outdoor unit" on
page 99.
Check procedure
Electrical check
PRELIMINARY ACTIONS
1. Switch off the Daikin unit via the user interface.
2. Switch off the Daikin unit with the field supplied circuit breaker.
3. Remove plate work when required.
section of the refrigerant circuit.
See "Outdoor unit" on
page 111.
See "Outdoor unit" on page 110.
PROCEDURE
1. Connect a pressure gauge to the high pressure service port and read the pressure.
2. From the graph below, determine the expected sensor output signal.
3. Power the Daikin unit.
4. Measure the voltage across high pressure sensor connector: pin 1-3 on the PCB; compare the measured voltage with the expected voltage.
Page 52 4/04/17 | Version 1.1
INFORMATION
To know where to plug in the pressure sensor connector, see "Component checklist" on page 111.
RA R32 Split & multi split M-Series
ESIE16-02B | Part 2. Troubleshooting 2.4. Component checklist
Outdoor unit PCB
+5V
GND
S60
4
3
Red
Black
Measure DC voltage here
Microcomputer
A/D input
5. In case no voltage is measured across high pressure sensor connector: pin 1-3; do following checks:
2
1
White
High pressure sensor
INFORMATION
If 1 or more checks fail, replace the high pressure sensor.
Check 1
1. Check main PCB (refer to "Replacing main PCB" on page 84).
Check 2
1. Check if the high pressure sensor connector is plugged into PCB.
Check 3
1. Measure the voltage across high pressure sensor connector: pin 4-3; the measured voltage must be 5 VDC, if not replace
PCB.
2.4.2.6. Main PCB
Not available yet.
4/04/17 | Version 1.1 Page 53
RA R32 Split & multi split M-Series
-5.1
-0.5 0 0.5 1 1.5 2 2.5 3 3.5 4
0
5.1
10.2
15.3
20.4
25.5
30.6
35.7
40.8
45.9
51.0
Detected Pressure
P
H
(kg/cm2)
P
H
= 1.38VH-0.69
V
H
: Output Voltage (High Side) V
DC
Output Voltage (VH, VL)
High Pressure (PH)
ESIE16-02B | Part 2. Troubleshooting 2.4. Component checklist
2.4.2.7. Pressure sensor
Technical specification Description
The pressure sensor is an analog pressure sensor. The pressure sensor measures the pressure in the high pressure
Location
Piping diagram Wiring diagram Switch box Component overview of unit
See "Outdoor unit" on
page 104.
See "Outdoor unit" on
page 99.
Check procedure
Electrical check
PRELIMINARY ACTIONS
1. Switch off the Daikin unit via the user interface.
2. Switch off the Daikin unit with the field supplied circuit breaker.
3. Remove plate work when required.
section of the refrigerant circuit.
See "Outdoor unit" on
page 111.
See "Outdoor unit" on page 110.
PROCEDURE
1. Connect a pressure gauge to the high pressure service port and read the pressure.
2. From the graph below, determine the expected sensor output signal.
3. Power the Daikin unit.
4. Measure the voltage across high pressure sensor connector: pin 1-3 on the PCB; compare the measured voltage with the expected voltage.
Page 54 4/04/17 | Version 1.1
INFORMATION
To know where to plug in the pressure sensor connector, see "Component checklist" on page 111.
RA R32 Split & multi split M-Series
ESIE16-02B | Part 2. Troubleshooting 2.4. Component checklist
Outdoor unit PCB
S60
+5V
Red
Black
GND
4
3
Measure DC voltage here
Microcomputer
A/D input
2
1
White
High pressure sensor
5. In case no voltage is measured across high pressure sensor connector: pin 1-3; do following checks:
INFORMATION
If 1 or more checks fail, replace the high pressure sensor.
Check 1
1. Check main PCB (refer to "Replacing main PCB" on page 84).
Check 2
1. Check if the high pressure sensor connector is plugged into PCB.
Check 3
1. Measure the voltage across high pressure sensor connector: pin 4-3; the measured voltage must be 5 VDC, if not replace
PCB.
4/04/17 | Version 1.1 Page 55
RA R32 Split & multi split M-Series
ESIE16-02B | Part 2. Troubleshooting 2.4. Component checklist
2.4.2.8. Refrigerant thermistors
Technical specification Description
A single type of thermistor is used; the resistance vs. tempera­ture characteristics is shown in below table "Thermistor resist­ance / temperature characteristics (type 1)".
Location
Piping diagram Wiring diagram Switch box Component overview of unit
See "Outdoor unit" on
page 104.
See "Outdoor unit" on
page 99.
Check procedure
Mechanical check
PRELIMINARY ACTIONS
1. Switch off the Daikin unit via the user interface.
2. Switch off the Daikin unit with the field supplied circuit breaker.
The thermistors are used to measure the temperature at multiple locations inside the Daikin unit. The measured temperatures are processed by the main board.
See "Outdoor unit" on
page 111.
See "Outdoor unit" on page 110.
3. Locate the thermistor and check if thermal contact with the piping or ambient is ensured.
Electrical check
INFORMATION
If a thermistor check fails, replace the thermistor.
PRELIMINARY ACTIONS
1. Switch off the Daikin unit via the user interface.
2. Switch off the Daikin unit with the field supplied circuit breaker.
3. Remove plate work when required.
PROCEDURE
1. From the table in the appendix ("Component checklist" on page 111), select the thermistor that must be checked.
2. Measure the temperature of the thermistor using a contact thermometer.
WARNING: RISK OF FIRE
When reconnecting a connector to the PCB, do not apply force, as this may damage the connector or connector pins of the PCB.
3. Unplug the connector from the appropriate PCB and measure the resistance between the pins listed in the table in the appendix ("Component checklist" on page 111).
- Compare the measured resistance with the range determined by the lower and higher temperature.
4. If the measured resistance does not match the listed value, the thermistor must be replaced.
INFORMATION
All thermistors have a tolerance of 5%.
E.g. R3T air thermistor - main PCB - connector S90: pin 1-2 type 1:
• Measured temperature with contact thermometer: 23.1°C.
• Unplug the sensor and measure the resistance between S90: 1-2: 21.86 kΩ.
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RA R32 Split & multi split M-Series
ESIE16-02B | Part 2. Troubleshooting 2.4. Component checklist
• The resistance values are defined by below table "Thermistor resistance / temperature characteristics (type 1)":
- Resistance at 23°C: 21.85 kΩ.
- Resistance at 24°C: 20.90 kΩ.
• The measured value 21.86 kΩ is inside the range, thermistor R3T passes the check.
INFORMATION
The user interface allows to monitor most thermistors.
If the measured resistance of the thermistor matches the temperature measured with the contact thermometer but the temperature for the corresponding thermistor is not correct on the user interface display, replace applicable PCB.
Table 2-1: Thermistor resistance / temperature characteristics (type 1)
T °C kΩ T °C kΩ T °C kΩ T °C kΩ T °C kΩ
-20 197.81 0 65.84 20 25.01 40 10.63 60 4.87
-19
-18
-17
-16
-15
-14
-13
-12
-11
-10111.991039.96 3016.10 507.18 703.44
-9
-8
-7
-6
-5
-4
-3
-2
-1
186.53
175.97
166.07
156.80
148.10
139.94
132.28
125.09
118 .34
106.03
100.41
95.14
90.17
85.49
81.08
76.93
73.01
69.32
1
2
3
4
5
6
7
8
9
11
12
13
14
15
16
17
18
19
62.54
59.43
56.49
53.71
51.09
48.61
46.26
44.05
41.95
38.08
36.30
34.62
33.02
31.50
30.06
28.70
27.41
26.18
21
22
23
24
25
26
27
28
29
31
32
33
34
35
36
37
38
39
23.91
22.85
21.85
20.90
20.00
19.14
18.32
17.54
16.80
15.43
14.79
14.18
13.59
13.04
12.51
12.01
11. 52
11. 06
41
42
43
44
45
46
47
48
49
51
52
53
54
55
56
57
58
59
10.21
9.81
9.42
9.06
8.71
8.37
8.05
7.75
7.46
6.91
6.65
6.41
6.65
6.41
6.18
5.95
5.74
5.14
61
62
63
64
65
66
67
68
69
71
72
73
74
75
76
77
78
79
80 2.47
4.70
4.54
4.38
4.23
4.08
3.94
3.81
3.68
3.56
3.32
3.21
3.11
3.01
2.91
2.82
2.72
2.64
2.55
Table 2-2: Thermistor resistance / temperature characteristics (type 2)
T °C kΩ T °C kΩ T °C kΩ T °C kΩ T °C kΩ
-20 192.08 0 64.17 20 24.45 40 10.41 60 4.87
-19
-18
-17
-16
-15
-14
-13
-12
-11
-10 108.96 10 39.01 30 15.76 50 7.04 70 3.44
181.16
170.94
161.36
152.38
143.96
136.05
128.63
121.66
115 .12
1
2
3
4
5
6
7
8
9
4/04/17 | Version 1.1 Page 57
60.96
57.94
55.08
52.38
49.83
47.42
45.14
42.98
40.94
21
22
23
24
25
26
27
28
29
23.37
22.35
21.37
20.45
19.56
18.73
17.93
17.17
16.45
41
42
43
44
45
46
47
48
49
10.00
9.61
9.24
8.88
8.54
8.21
7.90
7.60
7.31
61
62
63
64
65
66
67
68
69
4.70
4.54
4.38
4.23
4.08
3.94
3.81
3.68
3.56
RA R32 Split & multi split M-Series
ESIE16-02B | Part 2. Troubleshooting 2.4. Component checklist
T °C kΩ T °C kΩ T °C kΩ T °C kΩ T °C kΩ
-9
-8
-7
-6
-5
-4
-3
-2
-1
103.18
97.73
92.61
87.79
83.25
78.97
74.94
71.14
67.56
11
12
13
14
15
16
17
18
19
37.18
35.45
33.81
32.25
30.77
29.37
28.05
26.78
25.59
31
32
33
34
35
36
37
38
39
15.10
14.48
13.88
13.31
12.77
12.25
11. 76
11. 29
10.84
51
52
53
54
55
56
57
58
59
6.78
6.53
6.53
6.53
6.29
6.06
5.84
5.43
5.05
71
72
73
74
75
76
77
78
79 80 2.47
3.32
3.21
3.11
3.01
2.91
2.82
2.72
2.64
2.55
2.4.3. System
Not applicable.
2.4.4. Others
Not applicable.
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ESIE16-02B | Part 2. Troubleshooting 2.5. Other capacity range
2.5. Other capacity range
Not applicable.
0
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ESIE16-02B | Part 2. Troubleshooting 2.5. Other capacity range
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ESIE16-02B | Part 3. Repair 3.1. Refrigerant repair procedures
Part 3. Repair
This part contains the following chapters:
Refrigerant repair procedures ..............................................................................................................................................................61
Service tools.........................................................................................................................................................................................65
Unit specific repair procedures.............................................................................................................................................................66
3.1. Refrigerant repair procedures
Overview:
Refrigerant piping handling ..................................................................................................................................................................61
Recovery procedure.............................................................................................................................................................................61
Refrigerant pump down ........................................................................................................................................................................63
Piping repair procedures ......................................................................................................................................................................64
3.1.1. Refrigerant piping handling
• Make sure the applied pressure is never higher than the unit design pressure as indicated on the nameplate (PS).
• Work according the F-gas regulation and/or local regulations.
• Make sure the correct amount according the F-gas regulation label on the unit (factory + additional where required) of
refrigerant is charged after repair.
• Make sure to use the appropriate equipment and tools according to the refrigerant and unit type.
• Charge non-azeotropic refrigerant (e.g. R-410A) always in a liquid state.
• R32 can be charged in gas phase.
• Make sure to use a digital scale (no charging cylinder).
• Execute correct vacuum drying procedure after repair work:
- -0,1 MPa / -760 mmHg / -750 Torr / -1 bar for at least 1 hour.
- Connect the unit according the available service ports, refer to "Recovery procedure" on page 61.
- Use related field setting where necessary to open expansion valve/solenoid valve.
3.1.2. Recovery procedure
3.1.2.1. Outdoor unit casing
1. Switch off the Daikin unit via the user interface.
2. Manually open the expansion valve (located on the outdoor unit).
3. Connect the vacuum pump, manifold, recovery unit and refrigerant bottle to the service port as shown below.
For the location of the service ports, refer to "Outdoor unit" on page 104.
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In case of 1 service port at the stop valves
Figure 3-1: 1 service port at the stop valves
3
2
1
1. Vacuum pump 3. To recovery pump
2. Connect flexible hose to service port 3 stop valve
.
INFORMATION
See instruction of the recovery pump supplier how to recover the refrigerant.
In case of 2 service ports at the stop valves
Connect both stop valve service ports to the manifold.
In case of 3 service ports at the stop valves
Connect 1 hose to the suction stop valve service port and 1 hose to the service port between the expansion valve and outdoor H/E.
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ESIE16-02B | Part 3. Repair 3.1. Refrigerant repair procedures
Figure 3-2: 3 service ports at the stop valves
L
H
V R
2
>
1
1. Vacuum pump 2. To recovery pump
INFORMATION
See instruction of the recovery pump supplier how to recover the refrigerant.
3.1.3. Refrigerant pump down
This unit is equipped with an automatic pump down operation which will collect all refrigerant from the field piping and indoor unit in the outdoor unit. To protect the environment, make sure to perform the following pump down operation when relocating the unit.
WARNING: RISK OF EXPLOSION
• When the refrigeration circuit has a leak, do not execute pump down with the compressor.
• Use recovery system into separate cylinder.
• Warning, explosive hazard exists when executing pump down.
• Pump down with compressor can lead to self-combustion due to air entering during pump down.
INFORMATION
Some outdoor units are equipped with a low pressure switch to protect the compressor by switching it off.
Never short-circuit the low pressure switch during pump down operation!
3.1.3.1. Small outdoor unit
1. Remove the valve lid from liquid stop valve and gas stop valve.
2. Carry out pump down operation.
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CAUTION
Refer to Installer Reference Guide for 'Pump down operation' procedure.
3. After 5-10 min (after only 1-2 min in case of very low Ta < -10°C), close the liquid stop valve with a hexagonal wrench.
4. Check on manifold if vacuum is reached, close gas stop valve and forced cooling operation.
3.1.3.2. Large outdoor unit
1. Stop all demands for the Daikin unit.
2. Switch OFF / ON the power supply of the outdoor unit.
3. Carry out pump down operation.
CAUTION
Refer to Installer Reference Guide for 'Pump down operation' procedure.
4. The compressor and outdoor fan will start automatically.
5. Request heating via remote controller to prevent HE freeze-up.
6. a. Check on manifold if vacuum is reached, close gas stop valve and forced cooling operation.
b. Once operation stops (after 3 to 5 minutes), close the liquid and the gas stop valve.
7. Pump down is now finished. U4 may be displayed on the remote controller, this is not a malfunction.
8. (After “pump down” is finished or stopped, keep the circulation pump running for at least 5 minutes.)
9. Switch OFF the power supply of the outdoor unit.
NOTE
• Make sure to re-open both stop valves before restart operation of the unit.
• After a finished or stopped pump down, the unit will perform a test run at first operation (same as during commissioning).
3.1.4. Piping repair procedures
• Make sure to cover open pipe ends during repair work so no dust or moisture can enter.
• Make sure to re-apply insulation removed during repair.
• Pipe expansion / flare making:
- Remove any burrs on the cut surface and use correct tool such as reamer or scraper (note that excessive deburring can thin the pipe walls and cause cracking of the pipe).
- Make sure the flare has the correct size (use a flare gauge).
- Make sure no particles remain in the piping.
- Apply just a drop of refrigerant oil on the inner surface of the flare.
- Make sure the flare connection is tightened with the correct torque (torque values refer to installation manual).
• Brazing:
- Use correct brazing tool.
- Use a phosphor copper filler metal (silver composition of 0 to 2%). Do not use flux material.
- Flush the piping before brazing with nitrogen to avoid oxidation of the inside of the copper tubes (nitrogen purity ≥ 99,99%).
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ESIE16-02B | Part 3. Repair 3.2. Service tools
3.2. Service tools
For an overview of the applicable service tools, please check the Daikin Business Portal: http://www.mydaikin.eu
Go to the tab “After-sales support” on the left side and then select “Technical support”.
You will then find a button “Service tools” which gives you an overview on which service tool to use for which product. Also additional information on the service tool (instruction, latest software) can be found there.
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ESIE16-02B | Part 3. Repair 3.3. Unit specific repair procedures
3.3. Unit specific repair procedures
Overview:
Indoor unit............................................................................................................................................................................................ 67
Outdoor unit......................................................................................................................................................................................... 68
Basic removal .......................................................................................................................................................................... 68
Replacing switch box ............................................................................................................................................................... 71
Replacing 4-way valve body .................................................................................................................................................... 73
Replacing 4-way valve coil ...................................................................................................................................................... 75
Replacing compressor ............................................................................................................................................................. 76
Replacing DC fan motor assembly .......................................................................................................................................... 79
Replacing expansion valve body............................................................................................................................................. 81
Replacing expansion valve motor............................................................................................................................................ 82
Replacing main PCB ............................................................................................................................................................... 84
Replacing propeller fan blade assembly.................................................................................................................................. 85
Replacing thermistors .............................................................................................................................................................. 87
Setting test mode for inverter checker..................................................................................................................................... 88
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ESIE16-02B | Part 3. Repair 3.3. Unit specific repair procedures
3.3.1. Indoor unit
Not applicable.
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ESIE16-02B | Part 3. Repair 3.3. Unit specific repair procedures
3.3.2. Outdoor unit
3.3.2.1. Basic removal
3.3.2.1.1 Single fan outdoor unit
3.3.2.1.2 Removing refrigerant connection cover
PRELIMINARY ACTIONS
1. Switch off the Daikin unit via the user interface.
2. Switch off the Daikin unit with the field supplied circuit breaker.
PROCEDURE
Removal
1. Loosen and remove 1 screw (1) that fix the refrigerant connection cover.
Figure 3-3: Removing refrigerant connection cover
1. Screw
3.3.2.1.3 Removing the top plate
PRELIMINARY ACTIONS
1. Switch off the Daikin unit via the user interface.
2. Switch off the Daikin unit with the field supplied circuit breaker.
PROCEDURE
Removal
1. Loosen and remove the 2 screws (1) that fix the top plate.
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Figure 3-4: Removing the top plate
1. Screw
3.3.2.1.4 Removing the front plate
PRELIMINARY ACTIONS
1. Switch off the Daikin unit via the user interface.
2. Switch off the Daikin unit with the field supplied circuit breaker.
PROCEDURE
Removal
1. Remove the top plate.
2. Loosen and remove the 8 screws (1) that fix the front plate.
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Figure 3-5: Removing the front plate
1. Screw
3.3.2.1.5 Removing the compressor sound insulation
PRELIMINARY ACTIONS
1. Switch off the Daikin unit via the user interface.
2. Switch off the Daikin unit with the field supplied circuit breaker.
PROCEDURE
Removal
1. Remove the top plate.
2. Remove the front plate.
3. Remove the compressor sound insulation (untwist the cord and remove the insulation).
Figure 3-6: Removing the compressor sound insulation
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ESIE16-02B | Part 3. Repair 3.3. Unit specific repair procedures
3.3.2.2. Replacing switch box
PRELIMINARY ACTIONS
1. Switch off the Daikin unit via the user interface.
2. Switch off the Daikin unit with the field supplied circuit breaker.
3. Remove plate work when required, refer to "Basic removal" on page 68.
PROCEDURE
Removal
1. Remove the insulation (1).
WARNING: RISK OF FIRE
When reconnecting a connector to the PCB, do not apply force, as this may damage the connector or connector pins of the PCB.
2. Unplug all connectors from the main PCB (2), see "Component checklist" on page 121.
3. Remove all electrical power wiring (3) from the wire terminals (4).
4. Remove the screws (5) that fix the wire clamp (6), remove the wire clamp (6).
5. Remove the screws (7) that fix the right side plate assembly (8).
6. Cut the cable tie (9).
7. Lift the switch box (10) from the Daikin unit.
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ESIE16-02B | Part 3. Repair 3.3. Unit specific repair procedures
Figure 3-7: Removing the switch box
1. Insulation 6. Wire clamp
2. Main PCB 7. Screw
3. Electrical power wiring 8. Right side plate assembly
4. Wire terminals 9. Cable tie
5. Screw 10. Switch box
Installation
1. Proceed in reverse order.
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ESIE16-02B | Part 3. Repair 3.3. Unit specific repair procedures
3.3.2.3. Replacing 4-way valve body
PRELIMINARY ACTIONS
1. Switch off the Daikin unit via the user interface.
2. Switch off the Daikin unit with the field supplied circuit breaker.
3. Recover the refrigerant, refer to "Recovery procedure" on page 61.
4. Remove plate work when required (refer to "Basic removal" on page 167).
PROCEDURE
Removal
1. Remove any parts that block the way to the 4-way valve.
INFORMATION
Follow local regulations and Daikin refrigerant repair procedures during the repair of your unit, refer to "Refriger-
ant repair procedures" on page 79.
CAUTION
The maximum applied Nitrogen pressure must not exceed 0.02 MPa.
2. Cut the 4-way valve pipes (2).
3. Remove the 4-way valve (5).
4. Recuperate the putty (3).
5. Recuperate the insulation (4).
4 1
1. Tie wrap 4. Insulation
2. 4-way valve pipe 5. 4-way valve
3. Putty
Figure 3-8: Removing the 4-way valve
34 2 5 2
Installation
WARNING
Overheating the 4-way valve will damage or destroy it.
1. Wrap a wet rag around the 4-way valve (5).
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INFORMATION
Install the putty on the 4-way valve.
Install the compressor sound insulation in the same location.
2. Proceed in reverse order.
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ESIE16-02B | Part 3. Repair 3.3. Unit specific repair procedures
3.3.2.4. Replacing 4-way valve coil
PRELIMINARY ACTIONS
1. Switch off the Daikin unit via the user interface.
2. Switch off the Daikin unit with the field supplied circuit breaker.
3. Remove plate work when required.
4. Remove any part that block the way to the 4-way valve coil.
PROCEDURE
Removal
1. Loosen and remove the screw (1) that fixes the 4-way valve coil (3).
2. Cut the tie wraps that fix the 4-way valve coil wiring.
WARNING: RISK OF FIRE
When reconnecting a connector to the PCB, do not apply force, as this may damage the connector or connector pins of the PCB.
3. Unplug 4-way valve connector from PCB.
Figure 3-9: Removing the 4-way valve coil
3 31 2
1. Screw 3. 4-way valve coil
2. Tie wrap
Installation
1. Proceed in reverse order.
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3.3.2.5. Replacing compressor
PRELIMINARY ACTIONS
1. Switch off the Daikin unit via the user interface.
2. Switch off the Daikin unit with the field supplied circuit breaker.
3. Recover the refrigerant, refer to "Recovery procedure" on page 53.
4. Remove plate work when required.
5. Remove any part that blocks the way to the compressor.
PROCEDURE
INFORMATION
Follow local regulations and Daikin refrigerant repair procedures during the repair of your unit, refer to "Refriger-
ant repair procedures" on page 53.
CAUTION
The maximum applied Nitrogen pressure must not exceed 0.02 MPa.
Removal
1. Remove the terminal cover (3) and unplug the compressor wiring (4) and take picture.
2. Using a pipe cutter, cut the compressor pipes (5) below the soldered joint.
3. Loosen and remove the 3 nuts (6) that fix the compressor (7).
4. Remove the compressor (7).
5. Remove the dampers (9) with bushings (10) from the compressor (7).
6. Recuperate the putty (8).
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ESIE16-02B | Part 3. Repair 3.3. Unit specific repair procedures
Figure 3-10: Removing the compressor
1. Screw 6. Nut
2. Partition plate assembly 7. Compressor
3. Terminal cover 8. Putty
4. Compressor wiring 9. Dampers
5. Compressor pipe 10. Bushing
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ESIE16-02B | Part 3. Repair 3.3. Unit specific repair procedures
Installation
CAUTION
The oil in the compressor is hygroscopic. Remove the caps from the compressor piping as late as possible.
INFORMATION
Before installing a new compressor, determine the cause of the compressor failure and take all required corrective actions.
INFORMATION
If the dampers are worn, replace the dampers. The bushings inside the dampers are recuperated for use with the new dampers.
INFORMATION
Install the putty on the compressor.
Install the compressor sound insulation in the same location.
1. Check damper status, replace when worn.
2. First install the 3 (new) dampers (without the bushings) on the new compressor.
3. Install the 3 bushings in the dampers.
4. When installing the new compressor, remove the caps from the compression pipe and the suction pipe as late as possible.
5. When soldering the compressor pipes, cover the compressor pipes with a wet cloth to prevent overheating the compressor (and the oil in the compression pipe).
6. Proceed in reverse order.
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ESIE16-02B | Part 3. Repair 3.3. Unit specific repair procedures
3.3.2.6. Replacing DC fan motor assembly
PRELIMINARY ACTIONS
1. Switch off the Daikin unit via the user interface.
2. Switch off the Daikin unit with the field supplied circuit breaker.
3. Remove the propeller fan blade assembly, refer to "Replacing propeller fan blade assembly" on page 149.
PROCEDURE
Removal
1. Remove the insulation (1) from the switch box.
2. Unplug the fan motor connector (3) from the main PCB.
WARNING: RISK OF FIRE
When reconnecting a connector to the PCB, do not apply force, as this may damage the connector or connector pins of the PCB.
3. Release the fan motor assembly harness (2) from the slot (4).
4. Slightly bend the harness retainers (5) to release the fan motor assembly harness (2).
5. Loosen and remove the screws (6) that fix the DC fan motor assembly (7).
6. Remove the DC fan motor assembly (7).
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7
8
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ESIE16-02B | Part 3. Repair 3.3. Unit specific repair procedures
Figure 3-11: Removing the DC fan motor assembly
1. Insulation 5. Harness retainer
2. Fan motor assembly harness 6. Screw
3. Connector 7. Fan motor assembly
4. Slot
Installation
1. Proceed in reverse order.
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ESIE16-02B | Part 3. Repair 3.3. Unit specific repair procedures
3.3.2.7. Replacing expansion valve body
PRELIMINARY ACTIONS
1. Switch off the Daikin unit via the user interface.
2. Switch off the Daikin unit with the field supplied circuit breaker.
3. Remove the expansion valve motor, refer to "Replacing expansion valve motor" on page 82.
4. Remove plate work when required.
5. Remove any part that block the way to the expansion valve body.
PROCEDURE
INFORMATION
Follow local regulations and Daikin refrigerant repair procedures during the repair of your unit, refer to "Refriger-
ant repair procedures" on page 61.
CAUTION
The maximum applied Nitrogen pressure must not exceed 0.02 MPa.
Removal
1. Recuperate the putty (1).
2. Using a pipe cutter, cut the expansion valve body pipes (2).
3. Remove the expansion valve body (3).
Figure 3-12: Removing the expansion valve
1 23
1. Putty 3. Expansion valve
2. Expansion valve pipe
Installation
WARNING
Overheating the expansion valve body will damage or destroy it.
1. Wrap a wet rag around the expansion valve body (3).
INFORMATION
Install the putty on the expansion valve body piping.
2. Proceed in reverse order.
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3.3.2.8. Replacing expansion valve motor
PRELIMINARY ACTIONS
1. Switch off the Daikin unit via the user interface.
2. Switch off the Daikin unit with the field supplied circuit breaker.
3. Remove plate work when required.
4. Remove any part that block the way to the expansion valve motor.
PROCEDURE
Removal
WARNING: RISK OF FIRE
When reconnecting a connector to the PCB, do not apply force, as this may damage the connector or connector pins of the PCB.
1. Remove the expansion valve motor (1) from the expansion valve body (2).
2. Unplug expansion valve motor connector from PCB.
3. Cut all tie wraps that fix the expansion valve motor (1) wiring.
Figure 3-13: Removing the expansion valve motor
1 2
1. Expansion valve motor 2. Expansion valve
Installation
INFORMATION
Replace all tie wraps that were cut during removal.
1. Proceed in reverse order.
INFORMATION
The expansion valve motor (3) is equipped with a pipe retention clip (1). The pipe retention clip (1) must be placed over the pipe (
2. When installing the expansion valve motor (3), lock it on the expansion valve.
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2) to lock the expansion valve motor (3).
RA R32 Split & multi split M-Series
ESIE16-02B | Part 3. Repair 3.3. Unit specific repair procedures
Figure 3-14: Locking the expansion valve motor
3
1 2
Y1S
1. Pipe retention clip 3. Expansion valve motor
2. Pipe
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ESIE16-02B | Part 3. Repair 3.3. Unit specific repair procedures
3.3.2.9. Replacing main PCB
PRELIMINARY ACTIONS
1. Switch off the Daikin unit via the user interface.
2. Switch off the Daikin unit with the field supplied circuit breaker.
3. Remove the switch box, refer to "Replacing switch box" on page 71.
PROCEDURE
Removal
1. Cut the 2 cable ties (1).
2. Loosen and remove the screw (2).
3. Loosen and remove the 5 screws (3).
4. Press the 2 latches (5) to unlock and remove the main PCB (4).
Figure 3-15: Removing the main PCB
1. Cable tie 4. Main PCB
2. Screw 5. Latch
3. screw 6. Heat sink compound
Installation
1. Apply Heat sink compound (6) before joining the main PCB and the heat sink.
2. Proceed in reverse order.
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ESIE16-02B | Part 3. Repair 3.3. Unit specific repair procedures
3.3.2.10. Replacing propeller fan blade assembly
PRELIMINARY ACTIONS
1. Switch off the Daikin unit via the user interface.
2. Switch off the Daikin unit with the field supplied circuit breaker.
3. Remove the propeller fan blade assembly, refer to "Replacing propeller fan blade assembly" on page 149.
PROCEDURE
Removal
1. Remove the insulation (1) from the switch box.
2. Unplug the fan motor connector (3) from the main PCB.
WARNING: RISK OF FIRE
When reconnecting a connector to the PCB, do not apply force, as this may damage the connector or connector pins of the PCB.
3. Release the fan motor assembly harness (2) from the slot (4).
4. Slightly bend the harness retainers (5) to release the fan motor assembly harness (2).
5. Loosen and remove the screws (6) that fix the DC fan motor assembly (7).
6. Remove the DC fan motor assembly (7).
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6
7
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ESIE16-02B | Part 3. Repair 3.3. Unit specific repair procedures
Figure 3-16: Removing the DC fan motor assembly
1. Insulation 5. Harness retainer
2. Fan motor assembly harness 6. Screw
3. Connector 7. Fan motor assembly
4. Slot
Installation
1. Proceed in reverse order.
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ESIE16-02B | Part 3. Repair 3.3. Unit specific repair procedures
3.3.2.11. Replacing thermistors
PRELIMINARY ACTIONS
1. Switch off the Daikin unit via the user interface.
2. Switch off the Daikin unit with the field supplied circuit breaker.
3. Remove plate work when required, see "Basic removal" on page 68.
PROCEDURE
Removal
1. Locate thermistor that needs to be replaced, see "Component checklist" on page 121.
2. Cut the tie wraps (1) that fix the insulation (3) and the thermistor wire (2).
3. Cut the insulation (3) and remove it.
4. Pull the clip (5) that fixes the thermistor (6).
5. Remove the thermistor (6) from the thermistor holder (4).
1. Tie wrap 4. Thermistor holder
2. Thermistor wire 5. Clip
3. Insulation 6. Thermistor
Installation
1. Proceed in reverse order.
Figure 3-17: Replacing a thermistor
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3.3.2.12. Setting test mode for inverter checker
3.3.2.12.1 For 2MXM outdoor units
Activate power transistor test operation from the indoor unit with the remote controller.
ARC466 Series
1. Turn the system on.
2. Select FAN operation with the [MODE] button on the remote controller.
3. Press the 3 buttons (TEMP▲, TEMP▼, MODE) simultaneously. → SC is displayed.
4. Press the TEMP▲ or TEMP▼ button and select “1”.
5. Press the [MODE] button. → Trial operation is activated
6. Press the [ON/OFF] button. → Power transistor test operation starts.
ARC452, ARC433 Series
1. Turn the system on.
2. Select FAN operation with the [MODE] button on the remote controller.
3. Press the 3 buttons (TEMP▲, TEMP▼, MODE) simultaneously. → 00 is displayed, the left digit is blinking
4. Press the [MODE] button. → 00 is displayed, the right digit is blinking.
5. Press the [MODE] button. →”7” is displayed
6. Press the [ON/OFF] button. → Power transistor test operation starts.
3.3.2.12.2 For 3 to 5 MXM outdoor units
Activate the power transistor test operation from the outdoor unit.
1. Press the forced cooling operation ON/OFF (push button SW1 on Service PCB) for 5 seconds, refer to "Outdoor unit" on
page 97
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ESIE16-02B | Part 4. Maintenance 4.1. Indoor unit
Part 4. Maintenance
This part contains the following chapters:
Indoor unit ............................................................................................................................................................................................89
Outdoor unit..........................................................................................................................................................................................90
4.1. Indoor unit
WARNING
Before performing any maintenance, power off the unit.
INFORMATION
After all checks are made, make sure the water and brine circuits are filled properly again and fluid pressures are in line with regulations (± 2 bar).
4.1.1. General maintenance
1. Optimal operation conditions
Cooling Heating
Differential between suction temperature and discharge temperature
DB 27°C 20°C
WB 19°C Not applicable
2. Correlation of air-conditioner's operation status, pressure and running current
COOLING Low pressure High pressure Running current
Dirty air filter Lower Lower Lower
Short circuit of air inlet/outlet Lower Lower Lower
Air mixed in refrigerant Higher Higher Higher
Water mixed in refrigerant Lower* Lower Lower
Dirt mixed in refrigerant Lower** Lower Lower
Refrigerant shortage (gas) Lower Lower Lower
Unsatisfactory compression Higher*** Lower Lower
* Water in the refrigerant freezes inside the electronic expansion valve and is basically the same phenomenon as pump down.
** Dirt in the refrigerant clogs filters inside the piping and is basically the same phenomenon as pump down.
*** Pressure differential between high and low pressure becomes low.
8~18°C 14~30°C
4/04/17 | Version 1.1 Page 89
RA R32 Split & multi split M-Series
ESIE16-02B | Part 4. Maintenance 4.2. Outdoor unit
4.2. Outdoor unit
4.2.1. General maintenance outdoor unit
1. Outdoor unit coil
- Straighten hair fins.
- Clear coil from dust, leaves, etc. with a fin-comb, or compressed air/N2. Avoid bending or damaging of the Alu fins during
the cleaning process.
CAUTION
Make sure not to bend the hair fins.
2. Correlation of air-conditioner's operation status, pressure and running current.
COOLING Low pressure High pressure Running current
Dirty air filter Higher Higher Higher
Short circuit of air inlet/outlet Higher Higher Higher
Air mixed in refrigerant Higher Higher Higher
Water mixed in refrigerant Lower* Lower Lower
Dirt mixed in refrigerant Lower** Lower Lower
Refrigerant shortage (gas) Lower*** Lower Lower
* Water in the refrigerant freezes inside the electronic expansion valve and is basically the same phenomenon as pump down.
** Dirt in the refrigerant clogs filters inside the piping and is basically the same phenomenon as pump down.
*** Pressure differential between high and low pressure becomes low.
Page 90 4/04/17 | Version 1.1
RA R32 Split & multi split M-Series
ESIE16-02B | Part 5. Appendix
Part 5. Appendix
This part contains the following chapters:
Field setting ..........................................................................................................................................................................................93
Detailed information setting mode........................................................................................................................................................97
Wiring diagram .....................................................................................................................................................................................98
Piping diagram ...................................................................................................................................................................................104
Component overview of unit...............................................................................................................................................................110
Product specific information ............................................................................................................................................................... 111
Switch box .......................................................................................................................................................................................... 111
Field information report ......................................................................................................................................................................112
4/04/17 | Version 1.1 Page 91
RA R32 Split & multi split M-Series
ESIE16-02B | Part 5. Appendix
Page 92 4/04/17 | Version 1.1
ESIE16-02B | Part 5. Appendix 5.1. Field setting
RA R32 Split & multi split M-Series
4/04/17 | Version 1.1 Page 93
5.1. Field setting
5.1.1. Indoor unit
5.1.1.1. Indoor fan control during thermostat off in cooling
Model: FTXM-M, ATXM-M (BMS) / Remote controller: ARC466A33
Software logic change for thermostat OFF is for cooling operation (to increase SEER) (for main stream models FTXM/CTXM).
Figure 5-1: How to change fan OFF to ON when in cooling thermo off
Model FTX25/35KM does not have remote controller which has such service mode.
Change fan on/off by remote controller (ARC480A11) in service mode.
1. Normal operation on remote controller.
2. Press "temperature (upper/lower) button" with "off button" in same timing (
→ go to "SC" service mode).
3. Press "temperature button" (→ "SC → A → 7 → SU" rotation = segment 1), select SU and press "fan button" as decision (→ number is displayed at the lower left).
4. Press "temperature button" (
→ 1~10), select 4 and press "fan button" as decision (→ number is displayed at the lower right).
5. Press "temperature button" (
→ 0~1), select 0 and press "fan button" as decision (0: fan ON, 1: fan OFF).
5.1.1.2. Brightness setting of multi-coloured lamp of the indoor unit
5.1.1.3. ON/OFF button on the indoor unit
1. Shortly press ON/OFF button indoor: auto, 25°C, auto fanspeed. To de-activate: shortly press ON/OFF again.
2. Press ON/OFF button indoor 5-9 seconds: forced operation mode = forced cooling. To de-activate: press again for 10 seconds.
1. Press TEMP and MODE buttons simultaneously.
2. SC is displayed on the screen.
3. Select L (light) with TEMP buttons up or down.
4. Press MODE button to enter brightness setting mode.
5. Press TEMP up or down to adjust brightness to L (low), H (high) or OFF.
6. Press MODE button again for 5 seconds to exit.
Temp
Temp
Temp
Mode SC
Mode
Mode
001
Mode
1
Select
“SU”
Select “4”
FAN ON
during cooling thermo off
FAN OFF
during cooling thermo off
Select
DISPLAY NORMAL
AFTER 60 s
ESIE16-02B | Part 5. Appendix 5.1. Field setting
RA R32 Split & multi split M-Series
Page 94 4/04/17 | Version 1.1
5.1.2. Outdoor unit
5.1.2.1. Facility setting for outdoor split units
This function is designed for facilities such as equipment or computer rooms. It is never to be used in a residence or office where people occupy the space.
Cutting jumper 6 (J6) on the circuit board will expand the operation range down to -15°C. However it will stop if the outdoor temperature drops below -20°C and start back up once the temperature rises again.
Figure 5-2: Jumper settings
* Cut J6 with nippers or a similar tool
Other jumper settings
J5: No function for this unit.
J8: Cold region setting (changing the operating range from - 10°C to -15°C).
J9: No function for this unit.
J11: Protection for error memory overwrite (only to be used during development).
J12: No function for this unit.
5.1.2.2. Multi split outdoor
5.1.2.2.1 Wiring error check
This product is capable of automatic correction of wiring error.
Press the “wiring error check switch” on the outdoor unit service PC board. However, the wiring error check switch will not function for 3 minutes after the safety breaker is turned on; or depending on the outside air conditions (see note 2). About 15 - 20 minutes after the switch is pressed, the errors in the connection wiring will be corrected.
If self-correction is not possible, check the indoor unit wiring and piping in the usual manner.
Figure 5-3: Service PC board wiring error check switch location
Note
1. For two rooms, LED3, 4 and 5 are not present, and for three rooms, LED4 and 5 are not present, and for four rooms LED 5 is not present.
2. If the outside air temperature is 5°C or less, the wiring error check function will not operate.
3. After wiring error check operation is completed, LED indication will continue until ordinary operation starts. This is normal.
4. Follow the product diagnosis procedures (details of product error diagnosis are listed on the back of the fight side plate).
LED12345 Message
Status
All flashing (simultaneously)
Autonomic correction impossible
Flashing (on after another)
Autonomic correction completed
w (one or more LEDs 1 to 4 are ON)
Abnormal stop (note 4)
1. Wiring error check switch (SW3)
1
ESIE16-02B | Part 5. Appendix 5.1. Field setting
RA R32 Split & multi split M-Series
4/04/17 | Version 1.1 Page 95
5.1.2.2.2 Dip switch settings
Figure 5-4: Dip switch location
1. Service monitor LEDs 6. Cool/heat selector
2. Connector for D checker 7. J_DP jumper
3. SW4 8. SW3
4. SW6 9. SW1
5. SW5
SW1
Forced operation
• In combination with the cool/heat selector switch the unit can be started in cooling or heating.
• Is also used to activate the inverter checker mode.
SW3
Cross wiring check (figure 5-4 on page 95).
J_DP jumper
Not used.
Cool/heat selector
• Used in combination with the SW1.
• Must be set in cooling for pump down operation.
SW4
Priority room setting.
The indoor unit for which priority room setting is applied takes priority in the following cases.
1-1 Operation mode priority
The operation mode of the indoor unit which is set for priority room setting takes priority. If the set indoor unit is operating, all other indoor units do not operate and enter standby mode, according to the operation mode of the set indoor unit.
1-2 Priority during high-power operation
If the indoor unit which is set for priority room settings is operating at high power, the capabilities of other indoor units will be some­what reduced. Power supply gives priority to the indoor unit which is set for priority room setting.
1-3 Quiet operation priority
Setting the indoor unit to quiet operation will make the indoor unit run quietly.
Setting procedure
Slide the switch to the ON side for the switch that corresponds to the piping connected to the indoor unit to be set (in the figure below, it is room A).
BE SURE TO SET ONLY ONE ROOM.
SW5
SW5-1 Heat mode lock
• This setting will force the unit to only operate in heating.
SW5-2 to SW5-4
• Not used.
SW6
SW6-1 Night quiet mode
About Night Quiet Mode
The Night Quiet Mode function reduces operating noise of the outdoor unit at night time. This function is useful if the customer is wor­ried about the effects of the operating noises on the neighbours.
SW6-2
• Not used.
2
3
4
5
6
7
91
8
ESIE16-02B | Part 5. Appendix 5.1. Field setting
RA R32 Split & multi split M-Series
Page 96 4/04/17 | Version 1.1
5.1.2.2.3 Cool mode lock
1. Use the S15 connector to set the unit to cool only. Short-circuit pins 3 and 5 of the connector S15 to set to only cool (C).
The following specifications apply to the connector housing and pins.
• ST products Housing: VHR-5N
• Pin: SVH-21T-1,1
Figure 5-5: S15 connector location
5.1.2.2.4 Multi Split outdoor jumper settings
Figure 5-6: Jumper location
5.1.3. Remote controller
Not applicable.
1. S15 connector pins 3-5
J7
Night quiet mode setting
J8
Not used
J12
Cold region setting for defrost change
J22
Not used
J23
Econo mode prohibition setting
J24
Not used
J25
Not used
J26
Cold region setting for increased max. Hz at low ambient
1
J8J7J22
J23
J26
J12
J24
J25
PCB
ESIE16-02B | Part 5. Appendix 5.2. Detailed information setting mode
RA R32 Split & multi split M-Series
4/04/17 | Version 1.1 Page 97
5.2. Detailed information setting mode
5.2.1. Indoor unit
Not available.
5.2.2. Outdoor unit
Not available.
5.2.3. Remote controller
Not available.
ESIE16-02B | Part 5. Appendix 5.3. Wiring diagram
RA R32 Split & multi split M-Series
Page 98 4/04/17 | Version 1.1
5.3. Wiring diagram
5.3.1. Indoor unit
Not applicable.
ESIE16-02B | Part 5. Appendix 5.3. Wiring diagram
RA R32 Split & multi split M-Series
4/04/17 | Version 1.1 Page 99
5.3.2. Outdoor unit
5.3.2.1. 2MXM50M
Figure 5-7: Wiring diagram - outdoor unit 2MXM50M
5.3.2.2. 3MXM68M
Figure 5-8: Wiring diagram - outdoor unit 3MXM68M
L
X1M
X2M
N
1 2 3
1 2 3
X3M
1 2 3
1 2 3
X4M
1 2 3
1 2 3
B
A
L N
BRN BLU
BLK
WHT
BLK
WHT
BLK
WHT
Z1C
Z5C
Z4C
RED YLW BLU
1
S
9
E1
E2
HL1
HN1
FU3 30A
ZF
SA1
V2
V3
FU1
3.15A
MRM20
MRM10
V401
PS
DB1
FU2
3.15A
DC+
DC-
W V U
IPM1
MR4
C110
RED
BLU
BRN
ORG
WHT
YLW
YLW
4 3 2 1
7
S70
1 3
S80
OUTDOOR
INDOOR
Y1S
M1F
MS
W V U
BLU
YLW
RED
Z3C
GRN
Z2C
GRN
( )
BLK
BLK
BLK
18
S90
R1T R2T R3T
1
10
S93
R4T R5T R6T
t°
1
10
S92
R9T R10T R11T
BLK
GRY
BRN
BLK
GRY
YLW
Y2S
MR308
RED
AL2
RED
AL1
C
PCB1
FU1,FU2,FU3
DB1
C110,C54,C56
IPM1
M1C
LED1-5,LEDA
M1F MRM10,MRM20 MR4,MR30,MR308 PCB1,PCB2 PS
Q1L
SA1 S1PH,S2PH SW1-SW6 V2,V3,V401 X1M-X4M Y1E-Y3E Y1S
Z1C-Z5C
ZF S,S2-S502 U,V,W
X11A,X13A,AL1,AL2
R1T-R11T
( )
( )
( A)
( B)
( C)
( A)
( B)
( C)
t°
t° t° t° t° t° t° t°
Y3E
Y2E
Y1E
15
1
5
15
M
WHT
YLW
ORG
BLU
REDMWHT
YLW
ORG
BLU
REDMWHT
YLW
ORG
BLU
RED
Y2S
S20 WHT
S21 RED
S22 BLU
( A)
( B)
( C)
S40
41
GRY
GRY
S2PH
BLK
BLK
Q1L
X13A
BLK
BLK
P>
S1PH
P>
BLK
3
MS
BLU
YLW
RED
M1C
X11A
GRN/YLW
111
S501
15
S502
A 1 2 3 4 5
S2
SW1
SW3
SW5
SW2
SW4
SW6
LED
PCB2
BLK
BRN
RED
ORG
YLW
GRN
BLU
PPL
GRY
WHT
SKY
BLU
BLK
BRN
RED
YLW
1
11
S201
15
S202
L803,L804
C54
C56
L803
L804
Ferrite core
Wiring diagram
Connector
Field wiring
Power supply
Room
Connector
Connector
Noise lter
Connector
To indoor unit
To indoor unit
To indoor unit
BLK: black
BRN: brown
GRY: grey ORG: orange
RED: red
WHT: white YLW: yellow
GRN: green
PPL: purple
Room
Room
Room
Room
Room
Outdoor
Condenser
Discharge
Room
Room
Room
Screw terminal
BLU: blue
SKY BLU: sky blue
Reactor
Diode bridge
Printed circuit board
Capacitor
Intelligent power module
Fuse
Compressor motor Fan motor Magnetic relay Magnetic relay
Switching power supply
Varistor Terminal strip with earth terminal
Reversing solenoid valve coil
Switch
High pressure switch
Overload protector
Surge arrestor
Electronic expansion valve coil
Solenoid valve
Room
Room
Room
Sheet metal
Liquid pipe
Gas pipe
< >
< >
Thermistor
Light-emitting diode
3D100359A
ESIE16-02B | Part 5. Appendix 5.3. Wiring diagram
RA R32 Split & multi split M-Series
Page 100 4/04/17 | Version 1.1
5.3.2.3. 4MXM-M
Figure 5-9: Wiring diagram - outdoor unit 4MXM-M
5.3.2.4. 5MXM-M
Figure 5-10: Wiring diagram - outdoor unit 2MXM50M
L
X1M
X2M
N
1 2 3
1 2 3
X3M
1 2 3
1 2 3
X4M
1 2 3
1 2 3
B
A
L N
BRN BLU
BLK
WHT
BLK
WHT
BLK
WHT
Z1C
Z5C
Z4C
RED YLW BLU
1
S
9
E1
E2
HL1
HN1
FU3 30A
ZF
SA1
V2
V3
FU1
3.15A
MRM20
MRM10
V401
PS
DB1
FU2
3.15A
DC+
DC-
W V U
IPM1
MR4
C110
RED
BLU
BRN
ORG
WHT
YLW
YLW
4 3 2 1
7
S70
1 3
S80
OUTDOOR
INDOOR
Y1S
M1F
MS
W V U
BLU
YLW
RED
GRN
Z2C
GRN
X5M
1 2 3
1 2 3
BLK
WHT
ORG
( )
BLK
BLK
BLK
18
S90
R1T R2T R3T
1
10
S93
R4T R5T R6T R7T
t°
1
10
S92
R9T R10T R11T R12T
BLK
GRY
BRN
RED
BLK
GRY
YLW
BLU
Y2S
MR308
RED
AL2
RED
AL1
C
D
PCB1
FU1,FU2,FU3
DB1
C110,C54,C56
IPM1
M1C
LED1-5,LEDA
M1F MRM10,MRM20
MR4,MR30,MR308 PCB1,PCB2 PS
Q1L
SA1 S1PH,S2PH SW1-SW6 V2,V3,V401 X1M-X5M Y1E-Y4E Y1S
Z1C-Z5C
ZF S,S2-S502 U,V,W
X11A,X13A,AL1,AL2
R1T-R12T
( )
( )
( A)
( B)
( C)
( D)
( A)
( B)
( C)
( D)
t°
t° t° t° t° t° t° t° t° t°
Y4E
Y3E
Y2E
Y1E
15
S23 YLW
M
WHT
YLW
ORG
BLU
RED
15
1
5
15
M
WHT
YLW
ORG
BLU
REDMWHT
YLW
ORG
BLU
REDMWHT
YLW
ORG
BLU
RED
Y2S
S20 WHT
S21 RED
S22 BLU
( A)
( B)
( C)
( D)
Z3C
3
MS
BLU
YLW
RED
M1C
X11A
GRN/YLW
111
S501
1
5
S502
A 1 2 3 4 5
S2
SW1
SW3
SW5
SW2
SW4
SW6
LED
PCB2
BLK
BRN
RED
ORG
YLW
GRN
BLU
PPL
GRY
WHT
SKY
BLU
BLK
BRN
RED
YLW
111
S201
15
S202
BLK
P>
S1PH
P>
BLK
BLK
X13A
Q1L
BLK
BLK
S2PH
GRY
GRY
14
S40
L802,L803
C54
C56
L803
L804
Ferrite core
Wiring diagram
Connector
Field wiring
Power supply
Room
Connector
Connector
Noise lter
Connector
To indoor unit
To indoor unit
To indoor unit
To indoor unit
BLK: black
BRN: brown
GRY: grey ORG: orange
RED: red
WHT: white YLW: yellow
GRN: green
PPL: purple
Room
Room
Room
Room
Room
Room
Room
Outdoor
Condenser
Discharge
Room
Room
Room
Room
Screw terminal
BLU: blue
SKY BLU: sky blue
Reactor
Diode bridge
Printed circuit board
Capacitor
Intelligent power module
Fuse
Compressor motor
Fan motor
Magnetic relay
Magnetic relay
Switching power supply
Varistor Terminal strip with earth terminal
Reversing solenoid valve coil
Switch
High pressure switch
Overload protector
Surge arrestor
Electronic expansion valve coil
Solenoid valve
Room
Room
Room
Room
Sheet metal
Thermistor
Liquid pipe
Gas pipe
< >
< >
Light-emitting diode
3D100361A
L
X1M
X2M
N
1 2 3
1 2 3
X3M
1 2 3
1 2 3
X4M
1 2 3
1 2 3
B
A
L N
BRN BLU
BLK
WHT
BLK
WHT
BLK
WHT
Z1C
Z5C
Z4C
RED YLW BLU
1
S
9
E1
E2
HL1
HN1
FU3 30A
ZF
SA1
V2
V3
FU1
3.15A
MRM20
MRM10
V401
PS
DB1
FU2
3.15A
DC+
DC-
W V U
IPM1
MR4
C110
RED
BLU
BRN
ORG
WHT
YLW
YLW
4 3 2 1
7
S70
1 3
S80
OUTDOOR
INDOOR
Y1S
M1F
MS
W V U
BLU
YLW
RED
Z3C
GRN
Z2C
GRN
X5M
1 2 3
1 2 3
BLK
WHT
ORG
( )
BLK
BLK
BLK
18
S90
R1T R2T R3T
1
10
S93
R4T R5T R6T R7T R8T
t°
1
10
S92
R9TR10TR11TR12TR13T
BLK
GRY
BRN
RED
BLK
GRY
YLW
BLU
X6M
1 2 3
1 2 3
BLK
WHT
GRY
Y2S
MR308
RED
AL2
RED
AL1
C
D
E
PCB1
FU1,FU2,FU3
DB1
C110,C54,C56
IPM1
M1C
LED1-5,LEDA
M1F MRM10,MRM20 MR4,MR30,MR308 PCB1,PCB2
PS
Q1L
SA1 S1PH,S2PH SW1-SW6
V2,V3,V401 X1M-X6M Y1E-Y5E Y1S
Z1C-Z5C
ZF S,S2-S502 U,V,W
X11A,X13A,AL1,AL2
R1T-R13T
( )
( )
( A)
( B)
( C)
( D)
( E)
BLK
BLK
( A)
( B)
( C)
( D)
( E)
t°
t° t° t° t° t° t° t° t° t° t° t°
Y2S
S23 YLWS20 WHT
S21 RED
S22 BLU
( A)
( B)
( C)
( D)
( E)
Y5E
1
5
S24 WHT
M
WHT
YLW
ORG
BLU
RED
Y4E
Y3E
Y2E
Y1E
1
5
M
WHT
YLW
ORG
BLU
RED
15
1
5
1
5
M
WHT
YLW
ORG
BLU
REDMWHT
YLW
ORG
BLU
REDMWHT
YLW
ORG
BLU
RED
3
MS
BLU
YLW
RED
M1C
X11A
GRN/YLW
111
S501
15
S502
A 1 2 3 4 5
S2
SW1
SW3
SW5
SW2
SW4
SW6
LED
PCB2
BLK
BRN
RED
ORG
YLW
GRN
BLU
PPL
GRY
WHT
SKY
BLU
BLK
BRN
RED
YLW
1
11
S201
15
S202
BLK
P>
S1PH
P>
BLK
BLK
X13A
Q1L
BLK
BLK
S2PH
GRY
GRY
1
4
S40
L803,L804
C54 C56
L803
L804
Reactor
Diode bridge
Ferrite core
Printed circuit board
Capacitor
Wiring diagram
Connector
Field wiring
Power supply
Intelligent power module
Room
Fuse
Compressor motor Fan motor Magnetic relay Magnetic relay
Switching power supply
Varistor Terminal strip with earth terminal
Reversing solenoid valve coil
Connector
Connector
Noise lter
Connector
To indoor unit
To indoor unit
To indoor unit
To indoor unit
To indoor unit
BLK: black
BRN: brown
GRY: grey ORG: orange
RED: red
WHT: white YLW: yellow
GRN: green
PPL: purple
Switch
High pressure switch
Overload protector
Room
Room
Room
Room
Room
Room
Room
Room
Room
Outdoor
Condenser
Discharge
Room
Room
Room
Room
Room
Screw terminal
BLU: blue
Surge arrestor
Electronic expansion valve coil
SKY BLU: sky blue
Solenoid valve
Room
Room
Room
Room
Room
Sheet metal
Thermistor
Liquid pipe
Gas pipe
< >
< >
Light-emitting diode
3D100360A
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